Pr Proto toDUNE-SP SP HV HVS Vertical Slice Test FRP Current - - PowerPoint PPT Presentation

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

NP04

• Power supply, cables, filters, feed through,

power supply, monitoring system/readout

• Similar to 300 kV test of SP feed through

with DP power supply:

https://indico.fnal.gov/event/17111/contribution/5/material/slides/0.pdf

• Curt will be at CERN ~June 6 and will

have some time to devote towards installation of the HV delivery chain before work on the TPC starts back up

• We should try and be fast with the test

38.2 mm Cable SP Feed Through SP Power Supply DP Power Supply LAr-filled Cryostat Video Stream Ground Plan Monitor

HV HV Deliv eliver ery Chain ain Tes est t (II) II): Statu tus an and Prep ep.

• Equipment @ Bldg. 182

PS, feedthrough, 22.0 mm cable Filter, 38.2 mm cable cable en route from EHN1 Readout electronics ready by next week (Flor, Sylvain)

• Cable terminations/connections to

filters

• Andrew at CERN June 7
• Plan is to have everything ready

except the cable terminations/filter connections when Andrew arrives

✓ ▲ ▲

• Readout electronics
• Modules at CERN
• Test those for reading out the

Heinzinger current and voltage output

• We also have 1 GPM board in the

setup (single GP below feed through) we can readout (currently on an

• scilloscope)
• Run over the weekend
• HV on: June 8, 9, 10
• 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

voltage several times and the current draw has not been nominal

• Significantly more current draw (~60x

at worse)

• Anticorrelation with humidity (see

right plot)

• Current across 50cm section of DP

FRP I-beam

• O(few GΩ) at ~50% relative humidity
• Current goes away completely (with

up to 20 kV) in LAr

40 45 50 55 60 65 70 30 35 40 45 50 55 60 65 70 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

Resistance Time and Date

NP02-FC-HV long term test 1

R [10 MOhm] Humidity(%rh)

• J. Yu, S. Horikawa

Hu Humid idity ity an and FR FRP P Curren ent t (II) II)

• Should monitor current draw during

the GAr purge phase of cryogenic commissioning to look for this effect

• Expect the effect on the single

phase detector to be ~8x less

• Potential tests at SBU – “module 0”,

spare FRP I-beams, no LAr

40 45 50 55 60 65 70 30 35 40 45 50 55 60 65 70 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

Resistance Time and Date

NP02-FC-HV long term test 1

R [10 MOhm] Humidity(%rh)

• J. Yu, S. Horikawa