The following is the shift report for 30Jan98, 01:00UT - 12:00UT.

General:

This is the last shift report to be submitted and circulated from the HXDS/BESSY calibration runs in Berlin, Germany. The success of which could not have been possible without the committed support of the PTB crew. For copies of this and all shift reports, visit the following site where reports are listed at the bottom of the "Test Run" pages: http://hea-www.harvard.edu/~norton/projects/axaf/bessy.html

I. Setup for FPC Relative Aperture Size Measurements.

After the photodiode relative aperture size measurements were concluded, similar measurements would be made with the FPC's and their 1.5 mm diameter blocking plate apertures. The photodiode measurements required some realignment of the whole diode/aperture/filter assembly, so new fpc beamcenters needed to be determined.

Run ID's 501579 thru 501585 were used to find centers of both fpc's. During these runs, a "bump" was seen while performing Y scans. Further investigation with 5um pinhole scans concluded that the bump was the result of a Z direction window wire within view of the 1.5 mm fpc blocking plate apertures. This wire showed up at the same location in the Y direction for both fpc's. Tim's installation sketch in the log book shows that this wire was observed upon installation of the blocking plate mask.

The new locations are as follows:

II. Relative Aperture Size Measurements

Note: The CMDB ID number identifies the FPC being used in the test by the first digit of the numerical portion of this alphanumeric system. "1" indicates FPC_X2 "2" indicates FPC_HN

Run ID, CMDB ID, Filter, IB, Rate, comments

• 501588, N-IXF-AP-1.805, Fe,161.437uA,5697Hz, PTB used data for current peaking.
• 501589, N-IXF-AP-1.805, Fe, 160.198uA, ___Hz, ABORTED
• 501590 NA 501591 NA 501592, N-IXF-AP-1.803, Fe, 79.319uA, 6023Hz
• 501595, N-IXF-AP-1.808, Fe, 31.160uA, 5547Hz
• 501596, N-IXF-AP-1.905, Be, 31.000uA, 5076Hz
• 501597, N-IXF-AP-1.903, Be, 13.292uA, 5126Hz
• 501598, N-IXF-AP-1.810, Fe, 13.858uA, ___ Hz, ABORTED
• 501599, N-IXF-AP-1.810, Fe, 13.244uA, 4874Hz

Time check, BESSY computer: 04:06:25, SAO computer: 03:05:47

• 501600, N-IXF-AP-1.815, Fe, 7193.121nA, 5248Hz
• 501601, N-IXF-AP-1.908, Be, 7174.503nA, 6224Hz
• 501602, N-IXF-AP-1.910, Be, 3893.364nA, 5392Hz
• 501603, N-IXF-AP-1.820, Fe, 1845.215nA, 4787Hz
• 501604, 1-D scan in ly, FPC_X2, to locate wire
• 501605, 1-D scan in ly, mapped wire, at ly = 23640
• 501606, Finer scan of same wire
• 501609, 1-D scan in ly, FPC_HN, to map wire, at ly = 23600
• 501611, Scan similar to 501609, wire located at ly = 23300
• 501612, Fine scan, ly = 23600
• 501616, N-IXF-AP-1.830, Fe, 1395.544nA, 5384Hz
• 501617, N-IXF-AP-1.915, Be
• 501618, N-IXF-AP-1.920, Be, 697.290nA, 5243Hz
• 501619, N-IXF-AP-1.930, Be, 268.835nA, 5114 Hz

Increased both FPC high voltage settings by 60V to 1670 (Vset), to repeat no filter absolute QE runs.

• 501623, N-IXF-AB-1.00, FPC_X2, no filter, 108.040el, 4262 Hz
• 501624, N-IXF-AB-2.00, FPC_HN, no filter, 106.192el, 4661Hz

III. Remaining CR linearity runs.

• 501629, N-IXF-CR-1.101, FPC_X2, Be, 61.994el, 838Hz
• 501630, N-IXF-CR-2.101, FPC_HN, Be, 62.079el, 966Hz

Gas system pressure 400 torr for all tests. CPT & APT read at gas system control panel.

• 501633, N-IXF-BG-0.900, background both detectors, shutter and gate valve closed. Ratemeter rates FPC_X2 = 6.8, FPC_HN = 2.4. High voltage 1679 (Vmon) both detectors.

All of the data have been FTP'd to //astrea.harvard.edu/data/hxds1/bessy/data/<date>, where <date> is in the format yymmdd (eg 980130).

We begin to pack for home ....................