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COS FUV High Voltage History Segment B

DateTimeHV Level (counts)HV Level (volts)Description
3/27/0300:00175-5245.75FUV02 installed; voltage value not verified
6/4/0921:050-2500.00First HV turn on: HVON
6/5/0916:55100-4069.00HV Ramp up to HVLOW
6/6/0920:51151-4869.19HV Ramp Up Step 1
6/8/0917:32157-4963.33HV Ramp Up Step 2
6/10/0919:23163-5057.41HV Ramp Up Step 3
6/12/0917:25169-5151.61HV Ramp Up Step 4
6/14/0919:00175-5245.75HV Ramp Up to HVNOM
8/5/0900:00167-5120.23Temporarily lowered voltage to 169/167 from 178/175 to match prelaunch gain
8/6/0912:00175-5245.75Return to nominal value
8/12/0900:00167-5120.23Lowered both segments to decrease modal gain
12/21/1004:00175-5242.75Temporary HV increase to original values
12/21/1009:29167-5120.23Return to nominal value
3/8/1119:31175-5245.75Increased HV to compensate for gain sag
7/27/1112:00167-5120.23Lifetime Position Characterization test
7/28/1100:00175-5290.08Return to nominal value
7/30/1100:00167-5120.23Lifetime Position Characterization test
7/30/1115:57175-5245.75Return to nominal value
7/30/1117:45167-5120.23Lifetime Position Characterization test
7/31/1100:00175-5245.75Return to nominal value
7/31/1112:00167-5120.23Lifetime Position Characterization test
7/31/1115:50175-5245.75Return to nominal value
7/31/1117:45167-5120.23Lifetime Position Characterization test
7/31/1119:40175-5245.75Return to nominal value
8/1/1113:40167-5120.23Lifetime Position Characterization test
8/1/1119:12175-5245.75Return to nominal value
2/21/1204:59167-5120.75Aperture Verification / Spectrum Placement test (FENA2)
2/21/1206:43175-5145.75Return to nominal value
2/27/1212:00142-4727.98HV Sweep with wavecal at new lifetime position
2/27/1212:20147-4806.43HV Sweep with wavecal at new lifetime position
2/27/1212:40153-4900.57HV Sweep with wavecal at new lifetime position
2/27/1212:49162-5041.78HV Sweep with wavecal at new lifetime position
2/27/1213:04168-5135.92HV Sweep with wavecal at new lifetime position
2/27/1213:20173-5198.68HV Sweep with wavecal at new lifetime position
2/27/1213:39175-5245.75Return to nominal value
2/28/1203:29151-4869.19HV Sweep with deuterium lamp at new lifetime position
2/28/1207:59175-5245.75Return to nominal value
3/12/1203:00167-5120.23Aperture Verification / Spectrum Placement test (FENA2)
3/12/1206:00175-5245.75Return to nominal value
3/19/1200:00142-4727.98HV Sweep with wavecal at new lifetime position
3/19/1200:40147-4806.43HV Sweep with wavecal at new lifetime position
3/19/1200:55153-4900.57HV Sweep with wavecal at new lifetime position
3/19/1201:10158-4979.02HV Sweep with wavecal at new lifetime position
3/19/1201:30162-5041.78HV Sweep with wavecal at new lifetime position
3/19/1202:00175-5245.75Return to nominal value
3/19/1206:00142-4727.98HV Sweep with wavecal at new lifetime position
3/19/1206:15147-4806.43HV Sweep with wavecal at new lifetime position
3/19/1207:00153-4900.57HV Sweep with wavecal at new lifetime position
3/19/1207:30158-4979.02HV Sweep with wavecal at new lifetime position
3/19/1208:00162-5041.78HV Sweep with wavecal at new lifetime position
3/19/1209:00175-5245.75Return to nominal value
3/19/1218:10142-4727.98HV Sweep with wavecal at new lifetime position
3/19/1218:55147-4806.43HV Sweep with wavecal at new lifetime position
3/19/1221:00153-4900.57HV Sweep with wavecal at new lifetime position
3/19/1221:20158-4979.02HV Sweep with wavecal at new lifetime position
3/19/1221:50162-5041.78HV Sweep with wavecal at new lifetime position
3/19/1222:30142-4727.98HV Sweep with deuterium lamp at new lifetime position
3/20/1204:15147-4806.43HV Sweep with wavecal at new lifetime position
3/20/1204:45153-4900.57HV Sweep with wavecal at new lifetime position
3/20/1205:30158-4979.02HV Sweep with wavecal at new lifetime position
3/20/1206:10162-5041.78HV Sweep with wavecal at new lifetime position
3/20/1206:30175-5245.75Return to nominal value
3/22/1220:00153-4900.57HV Sweep with deuterium lamp at new lifetime position
3/23/1201:00175-5245.75Return to nominal value
3/25/1200:00159-5057.47HV Sweep with deuterium lamp at new lifetime position
3/25/1218:00175-5245.75Return to nominal value
4/16/1200:00163-5057.47Target ACQ testing at new lifetime position
4/16/1209:00175-5245.75Return to nominal value
5/24/1200:00100-4069.00HV Recovery - Day 1
5/25/1200:00151-4869.19HV Recovery Day 2 - QE grid off
5/29/300:00100-4069.00HV Recovery Day 3 - QE grid off
5/30/1200:00157-4963.33HV Recovery Day 4 - QE grid off
5/31/1200:00151-4869.19HV Recovery Day 5 - QE grid off
6/1/1200:00163-5057.47HV Recovery Day 6 - QE grid off
6/4/1200:00157-4963.33HV Recovery Day 7 - QE grid off
6/5/1200:00169-5151.61HV Recovery Day 8 - QE grid off
6/7/1200:00163-5057.47HV Recovery Day 9 - QE grid off
6/8/1200:00175-5245.75HV Recovery Day 10 - QE grid off
6/11/1200:00169-5151.61HV Recovery Day 11 - QE grid off
6/12/1200:00175-5245.75HV Recovery Day 12 - QE grid off; back to HVNOM
6/17/1219:00163-5057.47Target ACQ testing at new lifetime position
6/19/1202:00175-5245.75Return to nominal value
7/23/1200:00163-5057.47New nominal HV value of 163 at second lifetime position
8/15/1222:00175-5245.75TDS old G130M/G140L target at old position
8/16/1201:00163-5057.47Return to nominal values
8/24/1211:00175-5245.75TDS old G160M target at old position
8/25/1209:00142-4727.98HV Sweep with wavecal at same postion as previous test
8/25/1210:05144-4759.36HV Sweep with wavecal at same postion as previous test
8/25/1210:15153-4900.57HV Sweep with wavecal at same postion as previous test
8/25/1210:30162-5041.78HV Sweep with wavecal at same postion as previous test
8/25/1210:45168-5135.92HV Sweep with wavecal at same postion as previous test
8/25/1211:00172-5198.68HV Sweep with wavecal at same postion as previous test
8/25/1203:00153-4900.57HV Sweep with wavecal at same postion as previous test
8/25/1203:20163-5057.47HV Sweep with wavecal at same postion as previous test
8/25/1203:30168-5135.92HV Sweep with wavecal at same postion as previous test
8/25/1203:50169-5151.61HV Sweep with wavecal at same postion as previous test
8/25/1204:00172-5198.68HV Sweep with wavecal at same postion as previous test
8/25/1204:45175-5245.75HV Sweep with wavecal at same postion as previous test
8/25/1218:30144-4759.36HV Sweep with wavecal above the new lifetime position
8/25/1218:40153-4900.57HV Sweep with wavecal above the new lifetime position
8/25/1219:00163-5057.47HV Sweep with wavecal above the new lifetime position
8/25/1219:20169-5151.61HV Sweep with wavecal above the new lifetime position
8/25/1220:00172-5198.68HV Sweep with wavecal above the new lifetime position
8/25/1220:30175-5245.75HV Sweep with wavecal above the new lifetime position
8/25/1221:00163-5057.47Return to nominal values
6/24/1316:00169-5151.61Changed HVNOM from 163 to 169
1/6/1400:00163-5057.47Characterization of gain at LP3 (LOP1)
1/6/1404:00167-5120.23Characterization of gain at LP3 (LOP1)
1/6/1406:30169-5151.61Return to nominal values
1/30/1416:00163-5057.47Testing placement of spectra at LP3 (LOP2/13618)
1/30/1421:00169-5151.61Return to nominal values
2/4/149:00167-5120.23Testing placement of spectra at LP3
2/4/1414:50169-5151.61Return to nominal values
7/7/140:00175-5245.75Testing new HV Management (LENA4/13637)
7/7/1411:57163-5057.47Testing new HV Management (LENA4/13637)
7/7/1412:04175-5245.75Testing new HV Management (LENA4/13637)
7/7/1412:32163-5057.47Testing new HV Management (LENA4/13637)
7/7/1412:40175-5245.75Testing new HV Management (LENA4/13637)
7/7/1413:08163-5057.47Testing new HV Management (LENA4/13637)
7/7/1413:15175-5245.75Testing new HV Management (LENA4/13637)
7/7/1414:00169-5151.61Return to nominal values
7/15/14 19:00163-5057.47Focus run and aperture placement at LP3 (LENA2/13635, LENA1/13634)
7/16/14 10:08167-5120.23G130M/1222 focus run at LP3 (LENA2/13635)
7/16/14 12:00169-5151.61Return to nominal values
7/21/14 0:00175-5245.75Changed HVNOM from 169 to 175

Last Modified: 21/08/2012