Report from BESSY, Monday evening thru Tuesday morning

• Shift Start: Monday Oct 20, 1997, 8:00 p.m. local time (18:00 UT)
• Shift End: Tues, Oct 21, 4 a.m. local time (2:00 UT) Oct 21

Operator: Robert A. Austin

Measurement Summary

Listed as : RunID, CMDB ID, Energy, Start Time, Comments

• 500356, aborted, flux was changing
• 500357, L-IXS-QE-1.01, 500eV, 18:42
• 500358, L-IXS-QE-1.04, 600eV, 19:09, 1300 sec at 780 Hz
• 500359, aborted to change integration time
• 500360, rate linearity, 700eV, 19:40, 2000 Hz
• 500361, rate linearity, 700eV, 19:42, 1500 Hz
• 500362, L-IXS-QE-1.05, 700eV, 20:26, 1000 Hz
• 500363, L-IXS-QE-1.06, 800eV, 20:46
• 500364, aborted--partial beam loss part way thru
• 500365, wrong procedure, wrong detector
• 500366, L-IXS-QE-1.08, 1000eV, ___, 1500 sec at 700 Hz
• 500367, aborted to increase integration time from 1000 sec to 1500 sec
• 500368, L-IXS-QE-1.09, 1100eV, ___, 1500 sec at 700 Hz

SSD_X on White light (12-20) beam

All measurements are of relative aperture size.  Integration times are 100 seconds.

With a beam current of 66 NA, we should have 66/0.78X1000=85000 electrons in the storage ring. By J. Auerhammer's calculation, we should have seen a rate of ~1500 sec-1, but we actually saw a rate of 550 sec-1.

Test runs listed as: RunID, CMDB ID, Aperture Size

• 500369, collect to see white light rate
• 500370, L-IXS-AP-2.06, 40 um
• 500371, L-IXS-AP-2.05, 50 um
• 500372, L-IXS-AP-2.04, 70 um
• 500373, L-IXS-AP-2.03, 100 um
• 500374, L-IXS-AP-2.02, 200 um
  

While making adjustments, all electrons were lost....Time to wait for the next injection later this morning.