Pr Proto toDUNE-SP SP HV HVS Vertical Slice Test FRP Current Kevin Wood May 29, 2018
HV HV Deliv eliver ery Chain ain Tes est t (I) I) • Vertical slice test before installing at 38.2 mm Cable NP04 • Power supply, cables, filters, feed through, SP Feed Through power supply, monitoring system/readout SP Power Supply • Similar to 300 kV test of SP feed through with DP power supply: DP Power Supply https://indico.fnal.gov/event/17111/contribution/5/material/slides/0.pdf • Curt will be at CERN ~June 6 and will LAr-filled Cryostat have some time to devote towards Video Stream installation of the HV delivery chain before work on the TPC starts back up Ground Plan Monitor • We should try and be fast with the test
HV HV Deliv eliver ery Chain ain Tes est t (II) II): Statu tus an and Prep ep. • Equipment @ Bldg. 182 • Readout electronics PS, feedthrough, 22.0 mm cable ✓ • Modules at CERN Filter, 38.2 mm cable cable en route ▲ • Test those for reading out the from EHN1 Heinzinger current and voltage output Readout electronics ready by next week ▲ • We also have 1 GPM board in the (Flor, Sylvain) setup (single GP below feed through) we can readout (currently on an • Cable terminations/connections to oscilloscope) filters • Andrew at CERN June 7 • Run over the weekend • Plan is to have everything ready except the cable terminations/filter • HV on: June 8, 9, 10 connections when Andrew arrives • Send to EHN1: June 11 • Install at EHN1: June 11, 12, 13
Hu Humid idity ity an and FR FRP P Curren ent t (I) I) • The DP field cage has seen high J. Yu, S. Horikawa voltage several times and the NP02-FC-HV long term test 1 current draw has not been nominal 70 70 • Significantly more current draw (~60x 65 65 at worse) 60 Resistance 60 55 • Anticorrelation with humidity (see 50 55 right plot) 45 50 • Current across 50cm section of DP 40 45 FRP I-beam 35 30 40 • O(few G Ω ) at ~50% relative humidity 25.05 – 00:00 25.05 – 12:00 26.05 – 00:00 26.05 – 12:00 27.05 – 00:00 27.05 – 12:00 28.05 – 00:00 28.05 – 12:00 Time and Date • Current goes away completely (with R [10 MOhm] Humidity(%rh) up to 20 kV) in LAr
Hu Humid idity ity an and FR FRP P Curren ent t (II) II) • Should monitor current draw during J. Yu, S. Horikawa the GAr purge phase of cryogenic NP02-FC-HV long term test 1 commissioning to look for this effect 70 70 65 • Expect the effect on the single 65 60 phase detector to be ~8x less Resistance 60 55 • Potential tests at SBU – “module 0”, 50 55 spare FRP I-beams, no LAr 45 50 40 45 35 30 40 25.05 – 00:00 25.05 – 12:00 26.05 – 00:00 26.05 – 12:00 27.05 – 00:00 27.05 – 12:00 28.05 – 00:00 28.05 – 12:00 Time and Date R [10 MOhm] Humidity(%rh)
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