HCAL Cosmics
From Hall A Wiki
This page acts as an archive of 'good' HCal cosmic runs.
Contents
April 2021
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
CMU PMT Voltages |
JLab PMT Voltages |
PS1 | LED Cycle | Notes |
---|---|---|---|---|---|---|---|---|---|
1698 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1675 V | -2050 V | 2 | 0->1 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1697 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1650 V | -2000 V | 2 | 0->1 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1696 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1625 V | -1950 V | 2 | 0->1 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1695 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1600 V | -1900 V | 2 | 0->1->2 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1694 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1575 V | -1850 V | 2 | 0->1->2 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1693 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1550 V | -1800 V | 2 | 0->1->2 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1692 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1525 V | -1750 V | 2 | 0->1->2->3 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1691 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1500 V | -1700 V | 2 | 0->1->2->3 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1689 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1475 V | -1650 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1688 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1450 V | -1600 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1687 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1425 V | -1550 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1686 | 4/20/2021 | ~3 min | 60k | (170,30) and (800,800) | -1400 V | -1500 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
1685 | 4/20/2021 | ~5 min | 100k | (170,30) and (800,800) | -1350 V | -1450 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Data from left half of HCal taken too, but all left half PMT HV = 0. Data only in PMTs 1-144. |
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Supercluster Trigger Threshold | PMT Voltages |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|
1681 | 4/18/2021 | ~90 min | ~1M | (154,50) and (800,800) | 200 mV | Voltages same as run 1439 (See Link [1]) | 0 | Trigger is the summing module superclusters. Raised threshold to just below point where trigger pulse disappears on scope (at 206 mV). |
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Cosmic Paddle Voltages LLS, LRS, RLS, RRS |
PMT Voltages |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|
1661 | 4/14/2021 | ~2 hr 8 min | ~1M | (600 ns, 200 ns) and (1000,1000) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages same as run 1439 except PMT 73 (-1779 V->-1600 V), PMT 74 (-1688 V->-1530 V), PMT 76 (-1780 V->-1520 V), PMT 109 (-1750 V->-1570 V). (See Link [2]) | 0 | Trigger is the OR of the two cosmic paddles. Fixed a few channels from run 1659 (ch 69 still broken). |
1659 | 4/13/2021 | ~1 hr 58 min | ~1M | (600 ns, 200 ns) and (1000,1000) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages same as run 1439 (See Link [3]) | 0 | Trigger is the OR of the two cosmic paddles. Full fADCs again and F1 clock switched to external TI 31.25 MHz clock (top crate). |
March 2021
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Supercluster Trigger Threshold | PMT Voltages |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|
1471 | 3/9/2021 | ~24 min | ~100k | (170,50) and (800,800) | 150 mV | Voltages same as run 1439 (See Link [4]) | 0 | Trigger is the summing module superclusters. Raised threshold again to see if left half (145-288) create vertical ADC pattern expected. |
1470 | 3/9/2021 | ~10 min | ~100k | (170,50) and (800,800) | 100.3 mV | Voltages same as run 1439 (See Link [5]) | 0 | Trigger is the summing module superclusters. Raised threshold to see if left half (145-288) create vertical ADC pattern expected. It seems to be appearing now. |
1456 | 3/8/2021 | ~42 min | ~1.5M | (170,50) and (800,800) | 12.5 mV | Voltages same as run 1439 (See Link [6]) | 0 | Trigger is the summing module superclusters. Two halves of HCal look very different. Suspect the threshold is affecting each side differently. |
February 2021
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Cosmic Paddle Voltages LLS, LRS, RLS, RRS |
PMT Voltages |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|
1439 | 2/25/2021 | ~2 hr 28 min | ~1.5M | (140,50) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages same as run 1271, except PMT 69 (from 1) =-1500 V (See Link [7]) | 0 | Trigger is the OR of the two cosmic paddles. First run after adding grease to a few modules and adjusting the orientation of two. Still missing fADC 1. |
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
CMU PMT Voltages |
JLab PMT Voltages |
PS1 | LED Cycle | Notes |
---|---|---|---|---|---|---|---|---|---|
1415 | 2/16/2021 | ~0.9 min | 15,129 | (170,50) and (800,800) | OFF | -2500 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1414 | 2/16/2021 | ~0.9 min | 15,597 | (170,50) and (800,800) | OFF | -2450 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1413 | 2/16/2021 | ~0.9 min | 15,095 | (170,50) and (800,800) | OFF | -2400 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1412 | 2/16/2021 | ~0.9 min | 15,107 | (170,50) and (800,800) | OFF | -2350 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1411 | 2/16/2021 | ~0.9 min | 15,089 | (170,50) and (800,800) | OFF | -2300 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1410 | 2/16/2021 | ~0.9 min | 15,259 | (170,50) and (800,800) | OFF | -2250 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1409 | 2/16/2021 | ~0.9 min | 15,204 | (170,50) and (800,800) | OFF | -2200 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1408 | 2/16/2021 | ~0.9 min | 16,001 | (170,50) and (800,800) | OFF | -2150 V | 2 | 0->1->2 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1407 | 2/16/2021 | ~1.1 min | 20,093 | (170,50) and (800,800) | OFF | -2100 V | 2 | 0->1->2->3 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1406 | 2/16/2021 | ~1.1 min | 20,074 | (170,50) and (800,800) | OFF | -2050 V | 2 | 0->1->2->3 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1405 | 2/16/2021 | ~1.3 min | 25,095 | (170,50) and (800,800) | OFF | -2000 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1404 | 2/16/2021 | ~1.3 min | 25,122 | (170,50) and (800,800) | OFF | -1950 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1403 | 2/16/2021 | ~1.3 min | 25,103 | (170,50) and (800,800) | OFF | -1900 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1402 | 2/16/2021 | ~1.3 min | 25,129 | (170,50) and (800,800) | OFF | -1850 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1401 | 2/16/2021 | ~1.3 min | 25,084 | (170,50) and (800,800) | OFF | -1800 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1400 | 2/16/2021 | ~1.3 min | 25,116 | (170,50) and (800,800) | OFF | -1750 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1399 | 2/16/2021 | ~1.3 min | 25,234 | (170,50) and (800,800) | OFF | -1700 V | 2 | 0->1->2->3->4 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1398 | 2/16/2021 | ~1.5 min | 30,145 | (170,50) and (800,800) | OFF | -1650 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
1397 | 2/16/2021 | ~1.5 min | 30,109 | (170,50) and (800,800) | OFF | -1600 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Only four PMTs had HV on for these data runs. They are PMT modules 149, 162, 245, and 269 (counting begins at 1). |
January/February 2021
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
CMU PMT Voltages |
JLab PMT Voltages |
PS1 | LED Cycle | Notes |
---|---|---|---|---|---|---|---|---|---|
1303 | 2/4/2021 | ~0.5 min | 10,717 | (170,30) and (800,800) | -1675 V | -2050 V | 2 | 0->1 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1302 | 2/4/2021 | ~0.5 min | 10,726 | (170,30) and (800,800) | -1650 V | -2000 V | 2 | 0->1 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1301 | 2/4/2021 | ~0.5 min | 10,659 | (170,30) and (800,800) | -1625 V | -1950 V | 2 | 0->1 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1300 | 2/4/2021 | ~0.75 min | 15,361 | (170,30) and (800,800) | -1600 V | -1900 V | 2 | 0->1->2 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1297 | 2/4/2021 | ~0.75 min | 15,284 | (170,30) and (800,800) | -1575 V | -1850 V | 2 | 0->1->2 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1294 | 2/4/2021 | ~0.75 min | 15,674 | (170,30) and (800,800) | -1550 V | -1800 V | 2 | 0->1->2 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1293 | 2/4/2021 | ~1 min | 20,589 | (170,30) and (800,800) | -1525 V | -1750 V | 2 | 0->1->2->3 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1292 | 2/4/2021 | ~1 min | 20,721 | (170,30) and (800,800) | -1500 V | -1700 V | 2 | 0->1->2->3 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1291 | 2/4/2021 | ~1.25 min | 25,737 | (170,30) and (800,800) | -1475 V | -1650 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1290 | 2/4/2021 | ~1.25 min | 25,924 | (170,30) and (800,800) | -1450 V | -1600 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1289 | 2/4/2021 | ~1.25 min | 26,146 | (170,30) and (800,800) | -1425 V | -1550 V | 2 | 0->1->2->3->4 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1288 | 2/4/2021 | ~1.5 min | 30,827 | (170,30) and (800,800) | -1400 V | -1500 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
1286 | 2/4/2021 | ~5 min | 101,099 | (170,30) and (800,800) | -1350 V | -1450 V | 2 | 0->1->2->3->4->5 1000 Events per Step |
Data from right half of HCal taken too, but all right half PMT HV = 0. Data only in PMTs 145-288 (from 1). |
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Cosmic Paddle Voltages LLS, LRS, RLS, RRS |
PMT Voltages |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|
1280 | 2/2-3/2021 | ~18 hr 42 min 29 sec | ~532k | (154,50) and (800,800) | Off | Voltages same as 1271 (See Link [8]) | 0 | Trigger is now the OR of the 18 summing modules. The summing module outputs currently go to a logic unit directly, but adding discriminators first is necessary. |
1271 | 2/1/2021 | ~2 hr 19 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1269 (See Link [9]) | 0 | Switched to Landau fit from skewed Gaussian. |
1269 | 1/25/2021 | ~2 hr 24 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1267 (See Link [10]) | 0 | |
1267 | 1/21/2021 | ~2 hr 22 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1265 (See Link [11]) | 0 | |
1265 | 1/19/2021 | ~2 hr 28 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1263 (See Link [12]) | 0 | |
1263 | 1/12/2021 | ~2 hr 53 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages mostly the same as 1239 with a few changes (See Link [13]) | 0 | |
1239 | 1/7/2021 | ~2 hr 39 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1237 (See Link [14]) | 0 |
December 2020
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) and F1 (Latency,Window) |
Cosmic Paddle Voltages LLS, LRS, RLS, RRS |
CMU PMT Voltage |
JLab PMT Voltage |
PS0 | Notes |
---|---|---|---|---|---|---|---|---|---|
1237 | 12/23/2020 | ~2 hr 42 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | Voltages calibrated from run 1235 (See Link [15]) | Voltages calibrated from run 1235 (See Link [16]) | 0 | |
1235 | 12/21/2020 | ~2 hr 46 min | ~1500k | (140,30) and (800,800) | -1850 V, -1200 V, -1100 V, -1000 V | left half = Calibrated from run 989 (See Link [17]), right half = -1500 V | left half = Calibrated from run 989 (See Link [18]), right half = -1600 V | 0 | The F1 seems to miss fADC pulses sometimes. Seems more on right half. |
November 2020
Run Number |
Date | Time | Approx. Evts |
fADC (Latency,Window) |
CMU PMT Voltage |
JLab PMT Voltage |
PS1 | LED Cycle | Notes |
---|---|---|---|---|---|---|---|---|---|
1206 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1375 V | -1375 V | 2 | 0->1->2->3->4->5 repeat | A few F1 FIFO overflow output. One JLab PMT saturating at LED5. |
1205 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1425 V | -1425 V | 2 | 0->1->2->3->4->5 repeat | Some F1 FIFO overflow output. A few CMU PMTs saturating at LED5. |
1204 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1450 V | -1450 V | 2 | 0->1->2->3->4->5 repeat | Fair number of CMU PMTs saturating at LED5. |
1203 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1400 V | -1400 V | 2 | 0->1->2->3->4->5 repeat | Some F1 FIFO overflow output. 7-2 turned on now. |
1202 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1350 V | -1350 V | 2 | 0->1->2->3->4->5 repeat | |
1201 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1300 V | -1300 V | 2 | 0->1->2->3->4->5 repeat | 7-2 still hasn't turned on. |
1200 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1250 V | -1250 V | 2 | 0->1->2->3->4->5 repeat | |
1198 | 11/19/2020 | ~1.5 min | ~30k | (170,30) | -1200 V | -1200 V | 2 | 0->1->2->3->4->5 repeat | |
1197 | 11/19/2020 | short | short | (170,30) | -1200 V | -1200 V | 2 | 0->1->2->3->4->5 repeat | |
1196 | 11/19/2020 | 19:46:09-19:47:40 | ~30k | (166,20) | -1200 V | -1200 V | 2 | 0->1->2->3->4->5 repeat | |
1187 | 11/19/2020 | 16:28:29-16:31:30 | ~40k | (170,20) | -1500 V | -1700 V | 3 | 0->1->repeat | |
1186 | 11/19/2020 | 16:13:40-16:16:56 | ~40k | (170,20) | -1500 V | -1600 V | 3 | 0->1->repeat |
Run Number |
Date | Approx. Evts |
CMU PMT Voltage |
JLab PMT Voltage |
RLS Voltage (Paddle) |
RRS Voltage (Paddle) |
Notes |
---|---|---|---|---|---|---|---|
1162 | 11/11/2020 | 500k | -1500 V | -1600 V | -1035 V | -875 V | TDC signal seems desynced with fADC signal after event 61866. |
1163 | 11/12/2020 | 500k | -1550 V | -1650 V | -1035 V | -875 V | |
1165 | 11/12/2020 | 500k | -1700 V | -1800 V | -1035 V | -875 V | |
1166 | 11/12/2020 | 500k | -1650 V | -1750 V | -1035 V | -875 V | A couple F1 FIFO overflow messages (very few). |
1167 | 11/13/2020 | 500k | -1600 V | -1700 V | -1035 V | -875 V | |
1168 | 11/13/2020 | 500k | -1500 V | -1600 V | -1035 V | -875 V | |
1169 | 11/14/2020 | 30k | -1675 V | -1850 V | -1035 V | -875 V |
October 2020
Run Number |
Date | Approx. Evts |
CMU PMT Voltage |
JLab PMT Voltage |
LLS Voltage (Paddle) |
LRS Voltage (Paddle) |
Notes |
---|---|---|---|---|---|---|---|
978 | 10/14/2020 | 500k | -1600 V | -1700 V | -1850 V | -1200 V | |
980 | 10/15/2020 | 500k | -1700 V | -1800 V | -1850 V | -1200 V | |
981 | 10/15/2020 | 500k | -1800 V | -1900 V | -1850 V | -1200 V | Lots of fADC saturation. |
983 | 10/15/2020 | 53k | -1900 V | -2000 V | -1850 V | -1200 V | Lots of fADC saturation. |
984 | 10/15/2020 | short | -1750 V | -1850 V | -1850 V | -1200 V | Some fADC saturation. |
987 | 10/15/2020 | 500k | -1650 V | -1750 V | -1850 V | -1200 V | |
988 | 10/16/2020 | 500k | -1550 V | -1650 V | -1850 V | -1200 V | |
989 | 10/16/2020 | 500k | -1500 V | -1600 V | -1850 V | -1200 V |