CRL3 arm 2, 5 and 9 were mecanically religned to the V groove and retracted to some y position.

The y motor position was recalibrated by moving the motor to the lower limit switch, moving it up by 0.5 mm and then recalibrating the motor and encoder position to the former software limit position.

In that down position, the x range was tested by moving into the limit switches:

arm 2 x -1.213 to 0.824

arm 5 x -1.22 to 1.73

arm 9 x -0.32 to 2.256

The x limit switches were not changed and also the motor x axis were not recalibrated.

After that the x and y motors were moved to the x and y out position as stored in the CRL3 MDL. In that position, it was confirmed that all SEPS interlocks are triggered.

CRL3 is thus set-up for the SEPS testing, that will take place on the 24th of January.

We took the beam from 7 am, 24 h operation in three shifts.

We set up a new scheme for aligning the beam to the HED branch, which gives one X-ray axis downstream of the tunnel even if we operate at different angles of M1 and M2 (i.e. 3 to 2 mrad). This relies on a fixed M3 Tx position and was tested for 2.5 mrad and 3 mrad during the shifts. CRL3 in the HED optics hutch was aligned to the new beam postion, alignment of CRL2 in the XTD6 tunnel is still ongoing.

We tested most X-ray devices in the HED optics hutch and the HED experimental hutch and found them in good shape.

We tested and commissioned first time with the beam a new intensity position monitor at HED that was installed in the winter maintenance period in the HED optics hutch (inhouse design).

There was an issue with the M2 mirror feedback and we asked DOC to help us with that today already as we need to have a stabilised beam for the night when we are planning to do AGIPD and epix flat fileding. Work on that is ongoing.

Start up of HED ongoing for the three shifts

Day shift:

• work on the new X-ray alignment scheme at 2, 2.5 and 3 mrad: test was positive and we can not work with Tx of M3 fixed at 4 mm for all M1 and M2 mirror angles.
• alignment of CRL2 to the new beam axis in XTD6

Late shift:

• test of MDL at 2 , 2.5 and 3 mrad: the beam was brought back with the actual stored positions
• Continuation of commissioning of the new IPM
• PAM, ILM and power slit alignment to new beam axis
• ALAS alignment to the new beam position

Night shift:

• AGIPD tests after ASICS have been replaced and timing scans, flat fielding could not be achieved and has to be done prior to the next user experiment in May using AGIPD
• Test of epix after repair (new Peltier)

Issues:

• calibration pipeline of epix does not work as darks cannot be applied and there is no signal on the background corrected signal
• there has been obviously some miscommunication about the RF window length: HED had requested 150 musec for the weekend and XO had confirmed that on Friday. To do that the timing was shifted earlier by 10 -20 musec on Friday. It sseems that this was no longer the setting for Saturday evening when we needed that for AGIPD test. Not sure where the message got lost.

17 Feb 2023, 17:15 : We centered Pin in the FEL beam and then imaged this pin with ILM and FSI to get common references.
                                 We corected astigmatism with OAP
                                 Then we introduced CRLb into the X-ray beam path and centered the CRLb to the beam axis.
                                 Then we translated crlb to to sharpen the image of the pin (i.e. meaning we are in imaging plan of CRLb).
                                 Aligned positions for crlb are:
                                   - detm20=56.069mm (longitudinal translation to the X-ray beam)
                                   - detm21= 27.322
                                   - hexapod:
                                              - x =   0.000   /  y=  0.000    / z= 0.040
                                              - u =  -0.250   / v=  0.000     /w = 0.260
                                   - image of the pin in CRLb can be found in att-1 7 att-2 (more zoomed)
                                   - sad that there is a weird halo due to CRL imperfections around the center fo the FOV.
                                   - Few free beam shots will need to be taken to be able to substract such structures in postprocessed images.
17 Feb 2023, 17:37 : We now move toward the Siemens star to optimize the definition of the focal plan of CRLb, and estimate the FOV (siemens start diameter being about 50um diameter)
                                 Adjusted position of detm20 to have the samples in the imaging plane of CRLb is: detm20 = 63.07mm
                                 We take a run to image the Siemens Star. It seems that resolution may be better than 1um, and we start to see the numbers.

Run 123 : Siemens star imaging in focal plane of the CRL4b.

                        To be noted: the FOV seems to be about 3 time the diameter of the Siemens star. However, defects of the CRL in the center of the FOV are problematic, and we need to outcenter the image to get a clean imaging.
                         Therefore, we have only a third of the FOV usable.

Run 124 : imaging of the pin

We move detector bench by 0.6m (toward IBS)

Run 125 : Pin imaging                                

We adjust CRL4b position with detm20 = 53.568 mm trying to optimize imaging of the siemens star.

Run 126 : Siemens star imaging
                           inner structure of the seimens star are more difficult to see. (air scattering?)

Run127 :  Imaging of the Pin with adjusted position found for the siemens star
Run128 :  Free beam imaging (in case we can remove the imperfections)

Quick and dirty normalisation of the Siemens start radiograph (run 127) using the reference from run 128 shows a well defined Siemens star down to 1um (cf. att-3).
Features from the inner ring can be observed. A more refined work on the data postprocessing would probably help to unveil part of those structures.
The overall transmission (modulated with the optics hutch attenuators) is about 1%

Clearly, downstream focusing of the X-rays give better imaging results (as expected due to lower Fresnel number) compared to upstream focusing which is heavily impacted by diffraction.

The bad halo in the center of the FOV was due to some defects on the edge of the beam / lenses.
By adjusting the power slits, we could somehow clean things. (cf. att-4)
The parameters of the power slits can be found in att-5.

17 Feb 2023, 20:46 Timing with the laser found.
17 Feb 2023, 20:46 : X-ray transmission set at 1.5% (optics hutch attenuators.)

Run 129 : Siemens star imaging with cleaned beam.
Run 130: Pin Imaging with clean X-rays
Run 131: Reference for the background

After same tricks as earlier, (normalizing siemens star by a background from free beam acquisition), we end up with a nice picture cf. att-6. We are happy!

17 Feb 2023, 21:30 : RAM ion detector for radioprotection has been placed on ladder close to IC1. Be careful around IC1, don't bump the ladder!!!
17 Feb 2023, 21:31 : Chains have been wrapped around IC1. Only people having the training for radiation protection from Erik can remove them.

17 Feb 2023, 21:32 : The macro for the energy calibration of RELAX can't be found

17 Feb 2023, 21:41  FSI shutter macro is configured for :
                                           - 180 mm is open
                                           -     0 mm is closed
                                           - By turning off the motors, you loose the micro steps, make sure the hole of the FSI shutter keeps centered with cold shot

ILM shutter for focus diagnostic is open at -60 mm and closed at 0 mm.
The shutter position needs to be checked roughly with MECHCAM-2 'FSE'

Reproducibility needs to be checked. Be aware if you drive the shutter in the limits and switch of the motor the shutter flies around ( no gear). 1mm = 1 deg

17 Feb 2023, 21:56 :
Run 132 : cold shot
 

A2 - G3

17 Feb 2023, 22:50 : X-rays seem not to be triggered!!! It is impossible to capture a driven shot!!!
                                 Opening and closing of ppu seems to be random!!!!
                            It seems that PPU needs to always be on a known state before shot procedure, else it doesn't work!!!!!
                             

The Zyla 5 camera (optic peter) has a high drop rate of frames (cf. att-7). This needs to be fixed so that we have a chance to get radiographs.
It also seems that image rotation of 0 degree is correlated to bad unreadable aquisitions.
It needs to be investigated.

Ealier shift members managed to get a good quality image on Optique Peter by imaging the sample plane to the Optique Peter with downstream nanofocus (CRL4b). The quality is far superiour compared to the one with upstream nanofocus, which does just a projection of sample (backlight). The decision is to stay with the downstream CRL. They had a few full power shots. The problem of reading Zyla data when rotation = 0 is solved by Olly. He put the script in the shared folder. 

As no laser shots during the night shift, the plan for the night shift was to align as many AWE samples as possible so that we can shot tomorrow morning.

We successfully aligned samples (about 20 samples) which are in A-2 slot. Then, very, very, unfortunately, when we went to the A-1 samples, the top part of FSSS bump the ILM and we could not recover it. We have two choice now for the morning shift; whether we shot currently aligned samples (without checking the laser focal spot and timnig - those are should not be so wrong as it was checked late last evening by the late shift members); or, open IC1 and realign the ILM...

%%%%

18 Feb 2023, 00:33  Aligned the sample A2-E5. The laser comes from the top. What we see here is the 10 um thick Al top layer. The CH (~500 um thick) is below the Al on the screen, which is almost fully transparent for the x-ray beam. Att. 1

18 Feb 2023, 00:56 In order to optimze the rotation of the sample (so that the thickness projetion on the Optique Peter is minimum), we used the Hexapod "w". Unfortunately, this motor value is not saved onto the sample position table. Therefore, all previously saved positions are not valid any more. The current "w" value is -5.300 (att.4). We should not touch this value any more.

Att. 5 is the previously saved sample positions. We will delete many of these positions as those are not valid any more.

18 Feb 2023, 00:58 We aligned the wire to FSI, ILM and Optique Peter. Att. 2 and 3.

18 Feb 2023, 03:56 There was a collision with the ILM, when going to the top row on the target (AWE A2-B1), targets no longer visible on ILM. Wire also shows O(10um) offset on OptPeter. Previously aligned targets will be off.

18 Feb 2023, 04:23 We realign the wire, reproducible with a 20um offset applied in hex_x and hex_y (saved on the target positions)

18 Feb 2023, 04:24 We start a scan of ILM position to try and recover FoV (5 x 5 mm window, 2D scan, 250 um steps). No success; we couldn't find the flatfield. One suggestion is to shoot currently aligned targets blind.

18 Feb 2023, 05:00 Enter the hutch A.12 to connect the Timepix3. Radiation dose search.

18 Feb 2023, 05:20 Carsten optimized the CSLIT.

18 Feb 2023, 06:00 Moto worked on PAM. Found the time = 0  at 'spectral' encoding. Detail is in the corresponding eLog.

18 Feb 2023, 23:37 Together with the last shift members, we continued shooting laser on Cu 25 um thick wire for another 2 hours. We got excellent quality x-ray imaging with a series of time delay up to several ns (eLog ID 39).  X-ray imaging is now commissioned. The magnification was x7.5.

19 Feb 2023, 01:30 We tried to go to x20, but we couldn't find the x-ray beam. We even put the burn paper in front of the Optique Peter to verify the x-ray position, but still we couldn't see anything on the Optique Peter. Probably the x-ray was too weak. This activity was done with CRL4b "in", so the beam size was big on the Optique Peter. Next step is to remove the CRL3b and do the same exercise.

19 Feb 2023, 03:00 We switch to CRL4a (upsteam of the sample) and aligned.

19 Feb 2023, 03:30 In parallel, PAM work: added 10 mm thick SF57 on the spectral arm. Time = 0 is established for both spatial and spectral arm. See eLog ID 33.

19 Feb 2023, 06:10 Put a mesh 2000 lines and do the focal scan. 1.5 % transmission. Att.1. The focus is around Axis_5 = 95-100 mm.

19 Feb 2023, 08:08 Hand over from night shift

Added polarizer in the PAM beam in the optics hutch, reequilibrated reference arm of PAM

19 Feb 2023, 08:09 Darks taken for JF 1 and 2

19 Feb 2023, 08:28 Check sample alignment, correct for shot samples

19 Feb 2023, 08:33 Beam was off on Zyla, M3 feedback had to be restarted this morning. May this changed the setpoint. New setpoint is now at 342.4

19 Feb 2023, 09:09 Aligned edge of Cu foil on Zyla, then moved ILM to get a sharp image of the edge, then focus RELAX beam to this position

19 Feb 2023, 09:11 OAPX motor is in permanent error state

19 Feb 2023, 09:17 Focal spot does not look nice,

19 Feb 2023, 09:40 Start shooting foils

19 Feb 2023, 09:51 Cu foil  w Al B3-A3 , delay RELAX 100 fs before x-rays, run 257, seems we destroyed foils next to it

19 Feb 2023, 10:16 DOC called, OAPX is working again, reason unknown, seems to be an issue with the encoder. Needs checking the encoder on site.

19 Feb 2023, 11:09 Finished aligning samples, preparing for shot

19 Feb 2023, 11:15 Cu foil  w Al B3-A1, delay RELAX 200 fs before x-rays, run 260

19 Feb 2023, 11:23 Cu foil B3-B2, delay RELAX 200 fs before x-rays, run 262, sample next to it was damaged

19 Feb 2023, 11:39 Cu foil B3-B3, delay RELAX 200 fs before x-rays, run 264

19 Feb 2023, 11:46 Aligning grids

19 Feb 2023, 12:07 OAPX again in error state, used this time AY rotation instead, did not really change the focal spot. Add this motors to the switcht off

19 Feb 2023, 12:14 Cu mesh 2000 C3B3, delay RELAX 200 fs before x-rays, run 266

19 Feb 2023, 12:21 Need much longer delays, will go to RF locking

19 Feb 2023, 12:43 Phase shifter device was stuck in moving state, restarted

19 Feb 2023, 12:45 Cu mesh1000 C3B1, delay RELAX 2000 ps before x-rays, run 268

19 Feb 2023, 13:00 Cu mesh 2000 C3B2, delay RELAX 500ps before x-rays, run 270

27019 Feb 2023, 13:07 Seems that RELAX does not hit exactly in the field of view, change to configuration CRL4B

19 Feb 2023, 13:19 Cu mesh HEX 1000 C3A1, delay RELAX 500ps before x-rays, run 272

19 Feb 2023, 13:22 Shot is fine, stay with CRL setting, realign samples

19 Feb 2023, 13:50 DOC called, some motor flags have been changed for OAP_X. hopefully ito works until tomorrow

19 Feb 2023, 13:54 Cu mesh2000 C2A5, delay RELAX 100ps before x-rays, run 274

19 Feb 2023, 14:00 Cu mesh2000 C2A3, delay RELAX 20 ps before x-rays, run 277

19 Feb 2023, 14:06 Cu mesh2000 C2A2, delay RELAX 20 ps before x-rays, run 280

19 Feb 2023, 14:13 Cu mesh2000 C2A1, delay RELAX 500 ps before x-rays, run 284

19 Feb 2023, 14:17 Cu mesh2000 C2B1, delay RELAX 1000 ps before x-rays, run 287

19 Feb 2023, 14:23 Cu mesh2000 C2B2, delay RELAX 1000 ps before x-rays, run 290 PPU was open before shot and closed during shot

19 Feb 2023, 14:27 Cu mesh2000 C2B3, delay RELAX 1000 ps before x-rays, run 291

19 Feb 2023, 14:31 Cu mesh2000 C2B4, delay RELAX 80 ps before x-rays, run 295

19 Feb 2023, 14:35 Cu mesh2000 C2B5, delay RELAX 666 ps before x-rays, run 298

19 Feb 2023, 14:38  Moved Siemens star in (pos 25), run 300, is out of range, tried then pos 2, visible in live view, run 301

19 Feb 2023,15:30 Shift handover

Runs will be added in the general Elog for data runs and acqusitions (Elog-4)

- alignment of new wires to shoot with relax laser
- pump probe X-ray imaging with CRL4-a  (DAQ runs 306-320)
- realignment of CRL4b to compare data with CRL4-a imaging capabilities
- resolution check with X-ray only runs on siemens star (DAQ runs 321-323)
- shots with crlb (DAQ runs 324-347)

19 Feb 2023, 19:53 : DAQ crashed
19 Feb 2023, 19:56 : DAQ revived after restarting it
19 Feb 2023, 20:36 : All remaining wire are shot. We pass to shock target. Instead of doing side-on radiographs we go to face-on scheme (radiography colinear to the shock propagation.) |
19 Feb 2023, 20:40 : shock target alignement
19 Feb 2023, 22:16 : Shock targets shots (DAQ runs 348-390)
                                               Beautiful pictures here!!!!!!

Resumen of the shift: align and shoot, with beautiful images at the end (which was the main goal of the beamtime this week) .

Last night shift tasks :
- getting final siemens star and free beam radiographs with CRL4b (to see if the resolution keep consistant over time: it should be, but it is better to check it)
- Go back to CRL4a
- go as far as possible from tcc, and do edge scans with Ni foil (the one juste on top of NTT grid)
            - do refined edge scans every 5mm all along the travel range of CRL4a
- for next week, PAM time =0 needs to be as precise as possible, preparation of PAM for next beamtime.
- Going through Bspec data acquired today
 

8.2 keV, 750 uJ. 

Short summary

- Optimize the downstream nanofocus CRL to image the sample to our detector (optique Peter) - successful)

- Then we put a upstream nanofocus to focus on our sample location to directly image the x-ray spot. We scan Z to get the beam profile at different Z. - successful

- It appears that we couldn't get the best focus. The upstream CRL should move further toward the sample by a couple of cm. 

- We tried doing the edge scan. Scan tool clash the DAQ and we couldn't run the data. 

- Then, we used Extra-metro to do the edge scan. It was ok, but the observed values are scattered and normalization seems not working properly. Should analyze in more detail. Runs are taken 

- The spatial resolution of our imaging system seems to be about 2 um, most likely limited by the point spread function of the scintillator (mfp of excited electrons).  

- Then we put the Optique Peter further downstream by 2 m to gain magnification and better resolution. It appears that in order to image the sample to the Optique Peter at the end of the hutch, we need to move the downstream CRL toward upstream by about 4 cm. 

Details. 

19 Feb 2023, 23:33 Handover done. Although PAM work was suggested, Toma switch off the laser. So this task is impossible. Also, we do not have a flat-field to align samples. 

19 Feb 2023, 23:34 Put a Siemens Star in (pos. #25). No image is seen on the Optique Peter. We moved FSSS Y and X to find. We moved about 100-200 um. 

19 Feb 2023, 23:41 CRL4-B 'in' position was AXIS21 = 27.4 (different from yesterday). We moved out by moving 

19 Feb 2023, 23:42 Move out the CRL4-B. The beam center of mass is upper part of the slit. Touch M3 pitch via piezo. Siemens star image at the beginnig: Att.1.

19 Feb 2023, 23:52 Move Z of CRL4-B. Initial position: 52.77. Move by 5 mm. Image quality clearly worse. We move 2 mm steps. Each step, we see the difference in contrast.

19 Feb 2023, 23:59 Now, scan with 1 mm steps. The conclusion is that 51.77 +/- 2 mm is the best.

20 Feb 2023, 00:16 Go to the free space. Attenuate the x-ray beam further by x100 (T = 1e-4). Put CRL4-A. 

20 Feb 2023, 00:20 It appears that we did not need to add the attenuator. So, stay as it was: ~1%

20 Feb 2023, 01:30 Finished scanning Z. See ID47. The best spot size seems to be before the TCC even at the maximum Axis_5 position at 105 mm. 

20 Feb 2023, 01:50 We now move the CRL4-B focus to find the smallest spot. The smallest spot is found when we moved ~20 mm in Z. The smallest spot observed corresponds to 2 micron, which is probably our limitation of the imaging system, not necessarily the actual x-ray focus. See ID47 

20 Feb 2023, 02:05 Edge scan. We first put the Ni edge as suggested, but then realized that 25 um Ni at 8.2 keV only absorbs 70% of the x-ray beam (below K-edge). Therefore, we put the edge of the Si substrate of the Siemens stars. But this doesn't give a nice result. Switch to Ni mesh. Better, but the result is not convincing. 

20 Feb 2023, 03:45 Continue focus scan. See ID 47 for details. 

20 Feb 2023, 05:00 Put the Optique Peter at the end of the hutch. Initial distance = 56 cm (Att.1). Current distance 270 cm (~ 480 cm from the exit flange of IC1). 

20 Feb 2023, 05:43 Put extension flight tube 3 m (and remove the 50 cm one). Att. 2. Start pumping IC1.

20 Feb 2023, 06:00 Found Siemens star. But we reached the HW limit of the downstream CRL in order to image the TCC to the Optique Peter. See ID50. 

Day shift 28.02

Got the beam, aligned it up to the TCC, mirrors in 3 mrad configuration, checked positions for the CRLs. Optimised beam at the HAPG. Beam stability was fine, energy up to 1,5 mJ at 8.2 keV, and up to 1 mJ at 9.1 keV (used for the spectrometer calibration). 

Late shift 28.02

Tune back from 9.1 to 8.15 keV, beam was a bit shifted.

Spectrometer calibration and elastic scattering showed very precise beam photon energy.

Night shift 28.02-1.03

Night was dedicated to installation and alignment of CRL4. Start pumping IC1. There were a lot of issues with carabo (HED vacuum scene) DOC is informed.

Day shift 1.03 

Continued CRL4 a and b alignment. No big issues, beam is mostly fine, energy is also fine, but sometimes beam stabilization (feedbacks) stops working and observing.

HED would like to report that since 2 days the SASE2 beam is instable.
The attached movie shows, on the left (90° rotated, so up-down is left-right)
the beam at the end of the HED hutch, and on the right its the same beam
at the end of the XTD6 tunnel (HED-POPIN diamond window).

It jitters horizantally by more than 1.5 diameters.

We are taking data for users, but due to the jitter, only every 4th image is usable,
which mean also 3 out of 4 targets are lost.

We are haveing near collimated beam with CRL1 (XTD1) 1,6 and CRL2 (XTD6) 2,3)
to generate a large field of view on the target.

Ulf

Beam delivery SASE 8,25 keV, 1300 µJ. Intensity stable,
but beam jittery in horizontal. 

PRC (Dommach) did a ZZ around 13:00 and switched off coolling of M1 in XD1, but no effect on beam jitter.

We decided (around 18:00) that we will use intermediate focus (CRL1 arms 4,6). This is not providing optimal
properties in terms of divergence and chromaticity for our imaging experiment, but the jitter
prevented us from taking any meaningful data. The result is that the jitter is significantly reduced.

We are taking data since 20:00. Quality is moderate but we can live with it.

X-ray delivery stable in intensity, 1300-1400 mJ at 8150 eV SASE.

user experiment 3430 (Zastrau / Mishchenko)

Horizontal jitter compensated with intermediate focus (by overfocusing with CRL in XTD1, and focus on target with CRLs in HED OPT.
Beam drifts compensated by M2, M3 mirror feedback

RELAX laser shots on 10 um Cu foils, last 12 h pumping a Cu 22+ resonance K line. probing laser plasma at 0, 5, 10, 20 and 50 um spatial offset

Completed our data set. We now have 100fs resolved 2d transmission images and K-resonance from +1 ps to -100 ps delay time.

Successful user experiment.

Got the beam, aligned it up to the TCC, mirrors in 3 mrad configuration, checked positions for the CRLs. Energy up to 500 uJ at 8.2 keV, 2 bunches. 
Feedback M2 PBLM-2 camera was UNKNOWN. Power cycle (just switch off >> on) solved the issue. Also, the screen was extracted. Insert the screen. However, the count is too low (30 counts) to make the feedback running. We found that the trigger timing for the PBLM-2 camera was off by 20 msec with unknow reason. Then we had >~200 counts. 
The beam jitter on Zyla was quite large (~1-2x beam width).

Installed and aligned CRL4a and b. Then we pumped IC1. We realized that the M2 feedback went off two times, this needs to be checked from time to time. Otherwise no big issues, beam is mostly fine, energy is also fine.

22 Mar 2023, 17:08 started the log, the aim for the shift is the alignment of the sample and source point measurement. In addition to that, we also plan to check the Greateyes camera.

22 Mar 2023, 17:53 continuing the sample alignment

22 Mar 2023, 17:54 SAMP_AY is the clockwise direction looking from the top. Positive is towards the smaller incident angles.

22 Mar 2023, 17:57 By moving negative in the coordinated move we brought the sample towards the sliding door when the direction is 90°.

0deg_-alignment-FS.png shows blocking the x-ray beam with the sample.

22 Mar 2023, 18:13 We moved the target paralell to the XFEL beam so that we can either see the direct beam or we block the beam with the target. The next step is to block half of the beam with the target.

direct-beam-0deg.png shows the beam passing by the sample.

22 Mar 2023, 18:39 New zero position is found as on the screenshot New_zero_position_2023-03-22_18-39-16.png 

22 Mar 2023, 19:31 A clear Specular reflection is seen (c.f. Specular_and_reflected_beam_2023-03-22_19-22-19). We now do the angle per px calibration.

22 Mar 2023, 19:35 Specular reflection moves by 41 px for 0.02 deg rotation of the Samp_AY stage. Hence, 20px/0.01deg = 0.00049deg/px

22 Mar 2023, 19:37 We move by 113p = 0.055 deg on Samp_Ay to see the direct beam w.r.t the original sample position. We now move Coordinated motion.

22 Mar 2023, 19:43 Sample aligned parallel to the FEL beam - screenhot attached

22 Mar 2023, 19:48 Sample aligned to an AOI of 0.5 degrees. Screenshot attached. Remember the 2theta shift in the beam angle when the sample stage is rotated by theta. (c,f, AoI_0p25deg_2023-03-22_19-48-29.png - note the angle in file name corresponds to SampAy). Aligned position of the sample is FS_nearbottom_aligned_0.5deg_22032023. This position should be close to the edge at the bottom part of the sample.

22 Mar 2023, 20:54 Direct and Specular beamstops were aligned roughly with ALAS with the IC1 open by CB. We noticed that the breadboard of the specular beamstop motor is not fixed. We now check if this position is fine with the FEL beam without IC1 being pumped. CRL4a shall be driven inside to align this better from the control room.\

22 Mar 2023, 21:52 Direct beam stop was aligned with FEL beam. Specular beamstop was aligned horizontally. Specular vertical axis is only roughly centered.

22 Mar 2023, 22:25 Adjusted c-slits since they were clipping the beam before. p-slits are aligned as well.

22 Mar 2023, 22:48 Now we try to see something on the Greateyes. We bring in Relax alignment laser. Removed filters in IC1, free position in spectrometer. Switched off sensor power. Please insert the filters again before any laser shots!

22 Mar 2023, 23:10 We see something, but not clear what it is. Att. #7

During the night we worked on the temporal overlap between Relax laser and XFEL.

In the morning we noticed that the beam jitter is quite large (in and out of the aperture of the CRL4 lenses). There seems to be a correlation with the HED popin. We adjusted the TCC with x-ray and laser. Performed transmission scans.

We managed to see the direct beam on JF. Continued with sample alignment (grazing-incidence) and also aligned the beamblocks to block the direkt and the reflected beam.

During the night we worked on the temporal overlap between Relax laser and XFEL.

In the morning we noticed that the beam jitter is quite large (in and out of the aperture of the CRL4 lenses). There seems to be a correlation with the HED popin. We adjusted the TCC with x-ray and laser. Performed transmission scans.

We managed to see the direct beam on JF. Continued with sample alignment (grazing-incidence) and also aligned the beamblocks to block the direkt and the reflected beam.

22 Mar 2023, 23:30 Handover from late shift

Tasks for the night:

• source point measurement
• Sample alignment
• timing

23 Mar 2023, 00:39 Source point measurement with CRL1#2,6  Att1,2,3 Meansurements taken on YAG and attenuated beam

• source point: -13.9m
• divergence  : 3.38urad

23 Mar 2023, 02:39 birect BS out, specular in (cf. confluence); CRL4b out, 4a in (at rough focus ? (pos~70mm)); OPT ATT = 1.68e-7;
moved the sample upstream along the target surface (along 359.5deg) to see the downstream edge, brougth ILM and flatfield to fine tune downstream edge to TCC, see sharp edge on ILM and half FEL cut on JF (see attachment5), with IC1 light on two edges (front and backside) are destingushable; target saved to slot slot 26

23 Mar 2023, 03:06 moving the sample edge in hight; on the ILM we see it stays in the focal plane but moves sideways consistently with the JF were the beam gets less and less cut; tried to adjust the angle HEX V (should be around the axis along the FSSS frame) but this seems to be too tricky and time consuming because of the missing pivot point close to TCC. for this reason we can only go in small steps to not bump anything and losing the FOV off the ILM; since every sample will slightly different mounted a better approach might be to compensate the lateral shift in the imaging plane of the ILM by moving along this plane (135deg); for 23mm hight travel ~155um shift along 135deg is needed (after that we had to refocus the target edge by ~20um)

23 Mar 2023, 04:05 we decided now to switch to spatial overlap and timing. The FSI seems to be out of focus. Thats why we go back to a pin and center it to the current FEL beam position and ILM and will adjust the FSI if neccessary

• unfortunately nobody corrected the relay imaging path and/or the filter/beam block stage for the ILM !!
• fine tuned the wire alignment - image quality is very bad on FSI. Not really great on the ILM ( I guess we are clipping in the objective and relay lenses  (Att6 and 7). Seeing now the relative sharp image in the pin, it raises the question why the samples on the image (Att5) on the FSI are blurry.
• could not find t0 within a few ps; thus removed CRL4a, changed from JF (detb_x=820) to OP (detb_x=1151.1), 100% FEL transmission and from OCX to RF lock found back t0 in IC1 (~25ps off from yesterday)
• rechecked PAM spatial for all YAGs, with YAG emission on the camera we went to YAG 100um cross and refocus the objective
• went back to optical lock

8.2 keV, 1-2 bunches, 600uJ

23.3.

• did timing runs and optimized the beamline alignment
• Karabo was working very slow
• continued with sample alignment
• performed several xfel+laser shots
• opened the chamber and replaced samples

24.3.

• aligned xfel and Relax to TCC
• sample alignment
• taking shots