Summary of Run 2A and Plan for Run 2B Shekhar Mishra On Behalf of - - PowerPoint PPT Presentation

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Summary of Run 2A and Plan for Run 2B Shekhar Mishra On Behalf of - - PowerPoint PPT Presentation

Sep 17, 2023 232 likes •587 views

Summary of Run 2A and Plan for Run 2B Shekhar Mishra On Behalf of ICEBERG (BNL, CSU, Fermilab, LSU, PSL, SLAC, UCI, UK) Neutrino Division, Fermilab DUNE Collaboration Meeting 07/11/2019 Issues with Run 1 Field Cage: Sparked inducing 50-100

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SLIDE 1

Summary of Run 2A and Plan for Run 2B

Shekhar Mishra

On Behalf of ICEBERG (BNL, CSU, Fermilab, LSU, PSL, SLAC, UCI, UK) Neutrino Division, Fermilab DUNE Collaboration Meeting 07/11/2019

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SLIDE 2

Issues with Run 1

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 2

  • Field Cage: Sparked inducing 50-100 µAmps current
  • Condenser: Liquid Argon was bubbling every few seconds
  • Electrical: Current cross talk
  • These caused:
  • ~30 FEMB channels to be

dead

  • ~40% FEMB channels be

become unresponsive (cycling warm to cold makes them respond and function !)

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SLIDE 3

Improvement for Run 2A

  • Field Cage repaired:
  • Removed POGO Pins
  • Removed 1 cm of Printed Circuit Board at each corner
  • Direct wire joint between sides
  • 1 GOhm resistor only on top and bottom of FC
  • Condenser:
  • Stop condenser
  • Visually inspect bubbles stop
  • Manual control: Cryostat pressure
  • Electrical:
  • Return of FC moved from APA frame to Cryostat Ground
  • EPICS
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SLIDE 4

Electrical: Noise

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 4

  • Thanks to hard work or Rory and

Linda, (you could visit our yesterday’s art work at PAB), we have concluded that

  • PD detector power system induces

noise in CE. This is visible by increase in the low frequency noise in CE, change in the shape of the noise (fft) and overall rise of the noise level by up to 5 dB.

  • CE detector power system induces

noise in PD. This is visible in PD measurements (similar analysis), both in amplitude and frequency.

  • We have not tested what is the

effect of other power, we are sharing from CE crates, has on CE electronics.

  • Recommendation: PL506 and MPOD are the

baseline design of the DUNE-CE.

  • To accurately determine the CE noise

level, We would like to separate all the

  • ther power being providing from these

two units (if possible).

  • Need and proposed Solutions for PD:
  • We need a new separate crate and/or

power for PD system.

  • Grounding of these should be clearly

documented and discussed with ICEBERG.

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SLIDE 5

Comparison of CE/PD Noise

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 5

PD Off PD On

  • TPC in cryostat (06/13/2019)
  • Changes made to PD CAT6 and Power Supply
  • No 800 kHz pickup
  • 2-5 dB increase at low frequency
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SLIDE 6

Comparison of CE/Purity Monitor Noise

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 6

  • TPC in cryostat (06/17/2019)
  • No 800 kHz pickup
  • No increase at low frequency
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SLIDE 7

TPC on in Cryostat

Cathode/FC (10 kV) X Plane G /V Plane

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SLIDE 8

Goals for Run 2

  • Run 2A Goal:
  • Physics Goals:
  • a) Study the noise performance of CE and PD after all the changes;
  • b) Ensure that there is no further damage to CE FEMBs.
  • Run 2B Goal: Fully commission ICEBERG (We do not want to

switch to SBND type of FEMB without this run)

  • Physics Goals:
  • Operate TPC to see tracks,
  • Study the noise performance of CE and PD;
  • Ensure that there is no further damage to CE FEMBs.
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SLIDE 9

Schedule of Run 2A

  • All time below are rough guess and will depend on the availability of technical support staff. (Aria and Mike Z are

requested to help coordinate this).

  • 6/28 Friday morning turn CE power on only (48 Volts) and study if there is any change in CE channel count. till
  • 6/28 Friday 5:00 PM, Turn off CE and Turn the Condenser on.
  • 7/1 Monday July 1st turn CE on and run for 1 hour.
  • 7/1 Turn on Wire Bias and Run till 8:00 PM.
  • 7/1 Monday 8:00 PM Turn off Wire Bias and CE, return the cryostat in condenser mode.
  • 7/2 Tuesday 6:00 AM topped Cryostat.
  • 7/2 Tuesday 10:00 AM July 2nd Turn on CE, Wire Bias and Cathode
  • 7/2 Tuesday 8:00 PM Turn off Wire Bias and CE, return the cryostat in condenser mode.
  • 7/3 Wednesday 6:00 AM topped Cryostat.
  • 7/3 Wednesday 10:00 AM July 2nd Turn on CE, Wire Bias and Cathode
  • 7/3 Wednesday 8:00 PM Turn off Wire Bias and CE, return the cryostat in condenser mode.
  • 7/5 Friday 9:00 AM Turn off condenser
  • 7/5 Friday Study 9:00 AM PD only with no CE and TPC power. (This does not requires top off of the cryostat)
  • 7/5 Friday 5:00 PM Turn on condenser
  • 7/8 Monday 6:00 AM Top off Cryostat.
  • 7/8 -7/10 Top Off and Take Data 24 hours ……….
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SLIDE 10

Run 2A Filling

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 10 Room Temperature LAr at the 1/3 of Cryostat

  • Channels became responsive without getting submerged in LAr
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SLIDE 11

Condenser Off: No Bubbles

Cryostat Pressure Liquid Level

ICEBERG Cryogenic Run 2A Started on June 28th

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SLIDE 12

June 28: Cryostat filled to 61”

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 12 Cryostat Pressure Liquid Level

ICEBERG Cryogenic

Pulser

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SLIDE 13

LAr e Lifetime

~55 µSec

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SLIDE 14

Wire Bias On

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 14 Cathode V Cathode I

Although much smaller, Cathode still see Grid Current turn on

Plane Volts nAmps Volts nAmps Volts nAmps Volts nAmps Grid 165 3 335 1 500 1 665 1 U 90 2 180 1 290 1 370 1 X 210 7 410 7 620 8 820 7 X Plane Power Supply has an offset of 5nAmps. That is the current it draws at 0 volts, just power on

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SLIDE 15

Cathode & Field Cage On

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 15

  • 4+ Hours of CP/FC on
  • One spike of ~10

nAmps

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SLIDE 16

Tracks

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 16

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SLIDE 17

Tracks…

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 17

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SLIDE 18

Tracks…

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SLIDE 19

Tracks…

There are >30% of the events with tracks, that we stopped looking at them.

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SLIDE 20

Typical Day and Night

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 20

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SLIDE 21

Cryogenic Condition at start

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SLIDE 22

1st Run 2095 and 2096, Pulser 0 & 1 CE on

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 22

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SLIDE 23

1st Run 2097, Pulser 4 CE on

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SLIDE 24

Ramp up of all Bias and CP/FC

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SLIDE 25

Cryogenic at Start: No Bubble

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SLIDE 26

1st Run 2101, Pulser 0 & 1 TPC on

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 26

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SLIDE 27

1st Run 2103, Pulser 4 TPC on

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SLIDE 28

12+ hours of HV on

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SLIDE 29

TPC on, Runs 2100 and 2200

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 29

Runs are taken about every 8 mins and analyzed.

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SLIDE 30

Cryogenic Condition for 13 hours

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SLIDE 31

Run 2255/2259 before/after trip

07/09/2019 Mishra | Summary Run 2A and Plan for Run 2B 31

There has been a total of 3 trips of X plane (+ive) power

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SLIDE 32

Channel Counts through 07/10/19 (6:30 AM)

No channel has become unresponsive or died in 72 hours of CP/FC on at 15000 Volts. Run 2A Ended

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SLIDE 33

Schedule to start Run 2B

  • Goals:
  • Commission all the hardware that goes in the cryostat.
  • Make TPC work with reasonable lifetime
  • Plan and Schedule
  • Start warm up on 7/12/2019
  • We will not be pulling TPC out of cryostat.
  • Inside purifier done (7/19/2019)
  • Pipe’s for vent line and He supply (7/19/2019)
  • Install inside purifier in the cryostat. (7/24/2019)
  • Review and safety approval (7/24/2019)
  • Start pulling vacuum on the cryostat on (7/26/2019)
  • Start filling on 7/30/2019
  • Purify LAr over the weekend
  • Start DUNE-CE and PD data on 8/5/2019 (Two weeks later than what was presented
  • n 6/19/2019)
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SLIDE 34

Summary

  • Run 2A has been successful
  • PD and CE made improvements on noise studies.
  • TPC operated at full bias voltage
  • No further damage to FEMB channels.
  • While purity was good: Nice tracks