Report from BESSY

Tuesday 10/21 8 pm - Wednesday 10/22 5 pm (end of first half)

• SSD_5 on SX700
• SSD_X on 12-20 (white beam)
  

Listed as: runID, CMDB-ID, Energy

• 500399, L-IXS-QE-1.11, 1.212 KeV
• 500401, L-IXS-QE-1.10, 1.200 KeV
  

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

• 500479, L-IXS-AP-2.01
  
  

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.