Date: Fri, 24 Oct 1997 15:13:03 -0400
From: bradw@khan.harvard.edu (Brad Wargelin)
To: axaf@khan.harvard.edu
Subject: BESSY report for Tuesday and Wed
Report from BESSY
Tuesday 10/21 8 pm - Wednesday 10/22 5 pm (end of first half)
Robert Austin, Brad Wargelin, Tim Norton
Test Configurations
- SSD_5 on SX700
- SSD_X on 12-20 (white beam)
SRF/QE(E) Measurements on SX700 beam line
Listed as: runID, CMDB-ID, Energy
- 500399, L-IXS-QE-1.11, 1.212 KeV
- 500401, L-IXS-QE-1.10, 1.200 KeV
White light measurements with SSD_X
Relative aperture sizes
Listed as: runID, CMDB-ID, apsize, Comment
- 500402, L-IXS-AP-2.12, 5_12 Only 50 sec. You can see high-E punch-through
- 500403, L-IXS-AP-2.13, 5_40 The rest are 100 sec.
- 500404, L-IXS-AP-2.11, 7
- 500405, L-IXS-AP-2.10, 10
- 500406, L-IXS-AP-2.09, 15
- 500407, L-IXS-AP-2.08, 20
- 500408, L-IXS-AP-2.07, 30
- 500409, L-IXS-AP-2.06, 40
- 500410, L-IXS-AP-2.05, 50
- 500411, L-IXS-AP-2.04, 70
- 500412 L-IXS-AP-2.03, 100
Absolute QE
- 500414, L-IXS-AB-2.02, 5000 Al_125 ABS QE. Rate only 20 Hz, repeat
later.
QE uniformity map
- Used 140-um ap on beamline and 5-mm ap on SSD_X.
- Y is vertical, X is toward right as you look into the beam.
- +Y means you move the detector up wrt the beam, +X to the right.
- This series was run at about 800 Hz.
Listed as: runID, CMDB-ID, X, Y, itime
----- ------ ---- ---- -----
- 500415, L-IXS-QM-2.11, 0, 0, 250
- 500416, L-IXS-QM-2.01, 200, 400, 250
- 500418, L-IXS-QM-2.02, 0, 400, 250
- 500419, L-IXS-QM-2.03, -200, 400, 250
- 500421, L-IXS-QM-2.04, 400, 200, 250
- 500422, L-IXS-QM-2.05, 200, 200, 250
- 500423, L-IXS-QM-2.06, 0, 200, 250, See note below.
- 500424, L-IXS-QM-2.06, -200, 200, 250, See note below.
- 500425, L-IXS-QM-2.07, -400, 200, 350, See note below.
- 500426, L-IXS-QM-2.08, 400, 0, 350, See note below.
- 500427, L-IXS-QM-2.10, 200, 0, 400
- 500428, L-IXS-QM-2.11, 0, 0, 400
- 500429, L-IXS-QM-2.12, -200, 0, 400
- 500430, L-IXS-QM-2.13, -400, 0, 400
- 500431, L-IXS-QM-2.14, 400, -200, 400
- 500432, L-IXS-QM-2.15, 200, -200, 400
- 500433, L-IXS-QM-2.16, 0, -200, 400
- 500434, L-IXS-QM-2.17, -200, -200, 400
- 500435, L-IXS-QM-2.18, -400, -200, 400
- 500436, L-IXS-QM-2.19, 200, -400, 400
- 500437, L-IXS-QM-2.20, 0, -400, 400
- 500438, L-IXS-QM-2.21, -200, -400, 400
- 500439, L-IXS-QM-2.20, 0, -400, 400
- 500440, L-IXS-QM-2.19, 200, -400, 400
- 500441, L-IXS-QM-2.18, -400, -200, 400
- 500442, L-IXS-QM-2.16, 0, -200, 400
- 500443, L-IXS-QM-2.11, 0, 0, 400
- 500444, L-IXS-QM-2.06, 0, 200, 400
- 500445, L-IXS-QM-2.02, 0, 400, 400
- 500447, L-IXS-QM-2.11, 0, 0, 500
- 500448, L-IXS-QM-2.10, 200, 0, 500
- 500449, L-IXS-QM-2.09, 400, 0, 500
- 500450, L-IXS-QM-2.08, -400, 200, 500
- 500451, L-IXS-QM-2.07, -200, 200, 500
- 500452, L-IXS-QM-2.06, 0, 200, 500
- 500453, L-IXS-QM-2.05, 200, 200, 500
- 500454, L-IXS-QM-2.04, 400, 200, 500
- 500455, L-IXS-QM-2.03, -200, 400, 500
- 500456, L-IXS-QM-2.02, 0, 400, 500
- 500457, L-IXS-QM-2.01, 200, 400, 500
- 500458, L-IXS-QM-2.17, -200, -200, 400
- 500459, L-IXS-QM-2.16, 0, -200, 400
- 500460, L-IXS-QM-2.15, 200, -200, 400
- 500461, L-IXS-QM-2.14, 400, -200, 400
- 500462, L-IXS-QM-2.13, -400, 0, 400
- 500463, L-IXS-QM-2.12, -200, 0, 400
Beam put back to 0,0 for all subsequent tests. At some point roughly
around here SSD_X probably started to warm up. This may invalidate the
following counting rate linearity tests (or possibly even earlier tests).
We haven't had time to investigate.
Relative aperture sizes
Listed as: runID, CMDB-ID, apsize
- 500465, L-IXS-AP-2.02, 200
Counting Rate Linearity
Used 5-mm-diameter 250-um-thick Al filter with SSD_X on white beam.
Did this to knock out low-channel x-rays to eliminate complexities of counts
falling below LLD as a function of counting rate. Pulser rate increased
to ~102 Hz.
Listed as: runID, CMDB-ID, ratemeter, MCB-dead-rate, current
- 500466, L-IXS-CR-2.03, 4800 Hz, 7800, 2.00 nA
- 500467, L-IXS-CR-2.04, 4100 Hz, 7800, 1.60 nA
- 500468, L-IXS-CR-2.05, 3250 Hz, 7800, 1.19 nA
- 500469, L-IXS-CR-2.06, 2230 Hz, 7800, 1000 electrons
- 500470, L-IXS-CR-2.07, 1300 Hz, 7800, 440 elec
Saw strange things in spectrum. Runs 500471-476 were to diagnose. SSD
getting warm. Refill with LN2. Run 500477 is good background.
- 500478 L-IXS-CR-2.08 500 Hz 200 elec
Relative aperture sizes
Listed as: runID, CMDB-ID
Absolute QE
0 filter, 5-mm SSD_X aperture
- 500480, L-IXS-AB-2.03, 5 electrons ~1000 Hz
- 500481, L-IXS-AB-2.03, 2 electrons ~ 400 Hz
Reinject beam.
125-um-thick Al filter in 5-mm aperture.
- 500482, L-IXS-AB-2.02, 347 nA, 2350 Hz on ratemeter
- 500483, L-IXS-AB-2.02, 177 nA, 1250 Hz
- 500484, L-IXS-AB-2.02, 88.9 nA, 660 Hz
Kicked off beam a little after 5 p.m. local time. Swapped SSDs in prep
for second half, starting Friday at 10 p.m.
Notes
For runs 500424-426, add 1 to the QM-2.0#. RJA started run 500423 a
few seconds before the stages had been moved--no big deal. There then ensued
some confusion over the coordination of CMDB-IDs with mapping positions.
The positions listed above are correct (95% confidence), but the CMDB-IDs
as listed in the file headers are not correct.