! File: 2163C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:02:10:49 coverpage: title_1: FOS-OV 60/70 SLOW HIGH VOLTGE TURN-ON proposal_for: OV/FOS pi_fname: WILLIAM pi_lname: BAITY pi_inst: UNIV. OF CA - SAN DIEGO pi_country: USA pi_phone: (619) 534-3209 fos: X realtime: Y ! end of coverpage abstract: line_1: This is an OV test of the initial high voltage turn-on line_2: of the FOS red and blue detectors. This test is designed line_3: to provide for controlled increases in the high voltage line_4: with a dark count taken at each voltage for real-time line_5: analysis for detection of corona emission. If at any line_6: voltage step, the dark counts look unusually high, we plan line_7: to stop this activity and reset the voltage to 0. line_8: Non-SAA-impacted orbits must be used for this test. ! ! end of abstract general_form_proposers: lname: BAITY fname: WILLIAM inst: UNIV. OF CA - SAN DIEGO country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: OBSERVATION DESCRIPTION: line_3: 1 - This test brings the FOS from hold mode to an operational line_4: configuration with the high voltage at 0 volts, then line_5: increases the HV from 0 to 600 volts. HV is left at this line_6: setting for 2 minutes while a dark background accumulation is line_7: taken. The HV is then reset back to 0 volts while the dark line_8: count data are reviewed for corona emission. The dark count line_9: data have been flagged for real-time analysis with a 75 line_10: wait time for analysis in the exposure logsheets. If corona line_11: emission is found at any step, then the HV is to be reset to line_12: zero, FOS brought to HOLD mode, and the test terminated. line_14: 2 - In the next sequence, the HV is increased to 1000 volts line_15: for 2 minutes while dark counts are obtained. The voltage is line_16: then reset to 600 volts while the data is analyzed. line_18: 3 - In the next sequence, the HV is increased to 2000 volts line_19: for 2 minutes while dark counts are obtained. The voltage line_20: is then reduced to 1000 volts while the data is analyzed. ! question: 3 section: 2 line_1: 4 - In the following sequences, the voltage is raised to line_2: 5000, 8000, 11000, 14000, 17000, 20000, and 22000/23000 volts line_3: for 2 minutes while dark counts are obtained. The voltages line_4: are reduced to 2000, 5000, 8000, 11000, 14000, 17000, and line_5: 20000, respectively. line_7: 5 - In the next sequence, the voltage is raised again to line_8: 22000/23000 volts, then 5 consecutive 2 minute dark counts line_9: are obtained. line_11: 6 - After a 90 minute wait with the voltage maintained at line_12: 22000/23000, the 5 consecutive dark counts are repeated three line_13: times. line_15: 7 - Note that since a special flow is needed (to disable line_16: reconfiguration), the last line in the Exposure Logsheet for line_17: each detector explicitly turns off the high voltage. ! question: 3 section: 3 line_1: The analysis of each step of the test (i.e. the data taken line_2: with line 4) will be to examine the total counts in the line_3: spectrum. If coronal emission is present, the counts will be line_4: elevated from the expected level. If the total counts in the line_5: spectrum exceed the level which the IDT feels is appropriate, line_6: the next real-time interaction will be deleted and the line_7: command load will be allowed to bring the FOS to the SAFE line_8: configuration. ! question: 3 section: 4 line_1: As per Skip Schiffer, it is recommended that for the line_2: commanding for the real-time decision, the SMS contain the line_3: following inline RTCS definition: line_5: RTS ;Load RTCS line_6: BEGINDATA line_7: /MCTOFSW,FOS,FLAG5 ;Reset timeout line_8: /MRSTTBSW,FOS,FLAG5 ;Reset event flag line_9: /MWSPEVSW,FOS,FLAG5 ;Wait for flag line_10: /MJUMPSW,SAFEIT line_11: INCLUDE xxxxx ;Set the FOS High Voltage line_12: /MJUMPSW,DONE line_13: SAFEIT: /MINTSFSW,FOS ;Safe the FOS line_14: END: /MNOOPSW line_15: ENDDATA line_16: RTSCTRL ;Activate the RTCS line_17: COMCON ;Link must end before event wait ! question: 5 section: 1 line_1: NON-SAA-ORBITS line_3: This activity requires non-SAA-impacted orbits. This test line_4: has been designed to provide for a slow HV turn-on with line_5: monitoring of the FOS at each increased HV settings. As line_6: passage through the SAA will require that the HV DAC be line_7: reset to 0 volts, as many non-SAA-impacted orbits as possible line_8: should be contiguosly scheduled for this activity. line_10: If SAA-impacted orbits occur during this test, the FOS line_11: should be brought back to HOLD mode, with the HV DAC set to line_12: 0 volts. Once non-SAA-impacted orbits can be scheduled, the line_13: test can continue where is left off. line_15: REAL-TIME REQUIREMENTS line_17: RT analysis of the dark counts are required between HV line_18: increases to look for corona emission. A 75 minute timescale line_19: has been allocated for the analysis. If any of the dark line_20: counts looks unusually high, then the activity will be line_21: stopped and the HV DAC reset to 0 volts. For this reason, line_22: a real-time uplink is required between the end of the line_23: analysis time and the next HV increase, at which time either ! question: 5 section: 2 line_1: the HV will be increased, or the activity will be halted. line_2: A real-time downlink is also required to obtain the dark line_3: count data for analysis. line_5: OV PREREQUISITE ACTIVITES line_7: This test is to be performed after the activation of the line_8: FOS Ion gauge programs (FOS050/051 - Prop ID 2164). That line_9: program must show an ion gauge reading of 0.00001 Torr or line_10: less within 24 hours of HV turn-on. HRS pressure gauge line_11: reading of the same value is also acceptable. line_13: SPECIAL INSTRUCTIONS line_15: Prior and during this test, the standard configuration for line_16: FOS operations will be with the high voltage turned off. line_17: All reconfigurations of the FOS except for those specified line_18: within this test should leave the high voltage setting at line_19: zero volts. line_21: After this test has been successfully completed, FOS line_22: reconfigurations may configure the side which has been line_23: tested herein to the nominal high voltage setting. It is ! question: 5 section: 3 line_1: permissible to schedule FOS observations on a success line_2: oriented basis (i.e. assume that this test is successful and line_3: that subsequent observations may be made with high voltage line_4: set to the nominal value). If this test fails, the line_5: instrument will be placed in the Safe configuration until line_6: the schedule has been purged of all FOS observations which line_7: require high voltage. line_9: All of the high voltage settings within this test are line_10: preplanned and should be part of the onboard command load. line_11: Each step of the test will be enabled in real-time (using line_12: line 1) if and only if the preceeding step was satisfactory. line_13: If the real-time interaction does not occur either because line_14: the command link was lost or the previous step was line_15: unsatisfactory, the command load should place the FOS in the line_16: SAFE state. The SIEVENT (?) PSTOL procedure will be used to line_17: set the appropriate FOS event flag if the test is to line_18: continue. ! question: 7 section: 0 line_1: At OSS, the data will be presented as total line_2: counts per channel, printed out and examined for any line_3: evidence of corona emission (large number of counts across line_4: several channels). line_6: It is also desireable that the data be presented as a graph line_7: of counts vs. channel and printed in that form. Output will line_8: be retained by the FOS OV team for comparison with later line_9: orbits and other HV steps, as well as for studies of line_10: long-term background counts trends. ! !end of general form text general_form_address: lname: BAITY fname: WILLIAM category: PI inst: UCSD addr_1: CASS, C-011 city: LA JOLLA state: CA zip: 92093 country: USA phone: (619) 534-3209 ! ! end of general_form_address records ! No fixed target records found ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: HVSEQ targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 300S priority: 1 param_1: REALTIME=YES req_1: SEQ 1-6 NON-INT; ! linenum: 2.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: POINTING aperture: V1 num_exp: 1 time_per_exp: 60S priority: 1 comment_1: WAIT 60 SECONDS FOR HV comment_2: STABILITY. ! linenum: 4.000 sequence_1: ^ sequence_2: ^ targname: ^ config: # opmode: IMAGE aperture: BLANK sp_element: G130H num_exp: 1 time_per_exp: 120S priority: 1 param_1: SUB-STEP=4, param_2: Y-SIZE=1, param_3: X=-2048 comment_1: TAKE DARK TO LOOK FOR comment_2: CORONAL EMISSION. ! linenum: 5.000 sequence_1: ^ sequence_2: ^ targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 120S priority: 1 req_1: PAR WITH 4; comment_1: LINE 5 PROVIDES ENGINEERING comment_2: DATA DURING THE FOS DARK comment_3: COUNT OF LINE 4. ! linenum: 6.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: POINTING aperture: V1 num_exp: 1 time_per_exp: 130S priority: 1 comment_1: SET THE HV DAC BACK DOWN comment_2: AND DUMP UDL. ! linenum: 7.000 sequence_1: DEFINE sequence_2: HVDARK targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 5 time_per_exp: 2M priority: 1 req_1: PAR WITH 7.1; comment_1: CAPTURE TLM DATA FOR THE FIVE 2M comment_2: DARKS IN LINE 7.0 ! linenum: 7.100 sequence_1: ^ sequence_2: ^ targname: ^ config: # opmode: IMAGE aperture: BLANK sp_element: G130H num_exp: 5 time_per_exp: 2M priority: 1 param_1: SUB-STEP=4, param_2: Y-SIZE=1, param_3: X=-2048 ! linenum: 8.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: RT ANALYSIS FOR 9; req_2: DEC TIME 75M; comment_1: WITH HV DAC STARTED AT 0, SET comment_2: TO 600 VOLTS, TAKE DARK, THEN comment_3: RESET TO 0 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 9.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 10; comment_1: SET HV DAC TO 1000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 600 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 10.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 12; comment_1: SET HV DAC TO 2000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 1000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 12.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 14; comment_1: SET HV DAC TO 5000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 2000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 14.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 16; comment_1: SET HV DAC TO 8000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 5000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 16.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 18; comment_1: SET HV DAC TO 11000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 8000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 18.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 20; comment_1: SET HV DAC TO 14000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 11000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 20.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 22; comment_1: SET HV DAC TO 17000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 14000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 22.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 24; comment_1: SET HV DAC TO 20000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 17000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 24.000 sequence_1: USE sequence_2: HVSEQ config: FOS/RD req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 26; comment_1: SET HV DAC TO 23100 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 20000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 26.000 sequence_1: USE HVSEQ config: FOS/RD req_1: SEQ 26-27 NO GAP; comment_1: SET HV DAC TO 23100 VOLTS. ! linenum: 27.000 sequence_1: USE sequence_2: HVDARK config: FOS/RD ! linenum: 28.000 sequence_1: USE sequence_2: HVDARK config: FOS/RD req_1: AFTER 27 BY 90M; ! linenum: 29.000 sequence_1: USE sequence_2: HVDARK config: FOS/RD req_1: AFTER 28 BY 20M; ! linenum: 30.000 sequence_1: USE sequence_2: HVDARK config: FOS/RD req_1: AFTER 29 BY 20M; ! linenum: 106.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 108; comment_1: WITH HV DAC STARTED AT 0, SET comment_2: TO 600 VOLTS, TAKE DARK, THEN comment_3: RESET TO 0 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 108.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 110; comment_1: SET HV DAC TO 1000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 600 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 110.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 112; comment_1: SET HV DAC TO 2000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 1000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 112.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 114; comment_1: SET HV DAC TO 5000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 2000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 114.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 116; comment_1: SET HV DAC TO 8000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 5000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 116.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 118; comment_1: SET HV DAC TO 11000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 8000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 118.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 120; comment_1: SET HV DAC TO 14000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 11000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 120.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 122; comment_1: SET HV DAC TO 17000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 14000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 122.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 124; comment_1: SET HV DAC TO 20000 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 17000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 124.000 sequence_1: USE sequence_2: HVSEQ config: FOS/BL req_1: DEC TIME 75M; req_2: RT ANALYSIS FOR 126; comment_1: SET HV DAC TO 24100 VOLTS, comment_2: TAKE DARK, THEN RESET TO comment_3: 20000 VOLTS. comment_4: IF REALTIME ANALYSIS SHOWS comment_5: CORONAL EMISSION, TERMINATE comment_6: THIS ACTIVITY. ! linenum: 126.000 sequence_1: USE HVSEQ config: FOS/BL req_1: SEQ 126-127 NON-INT; comment_1: SET HV DAC TO 24100 VOLTS. ! linenum: 127.000 sequence_1: USE sequence_2: HVDARK config: FOS/BL ! linenum: 128.000 sequence_1: USE sequence_2: HVDARK config: FOS/BL req_1: AFTER 127 BY 90M; ! linenum: 129.000 sequence_1: USE sequence_2: HVDARK config: FOS/BL req_1: AFTER 128 BY 20M; ! linenum: 130.000 sequence_1: USE sequence_2: HVDARK config: FOS/BL req_1: AFTER 129 BY 20M; ! ! end of exposure logsheet ! No scan data records found