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.