Update on Foils (in SBND and DUNE) Andrzej Szelc (University of - - PowerPoint PPT Presentation

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Update on Foils (in SBND and DUNE) Andrzej Szelc (University of - - PowerPoint PPT Presentation

Apr 06, 2024 314 likes •478 views

Update on Foils (in SBND and DUNE) Andrzej Szelc (University of Manchester) This Talk You've just heard about updates to the simulation of scintillation light in DUNE and SBND. This talk will give a quick update on the hardware side:

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SLIDE 1

Update on Foils (in SBND and DUNE)

Andrzej Szelc

(University of Manchester)

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SLIDE 2

06/03/19

  • A. M. Szelc @ DUNE UK

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This Talk

  • You've just heard about updates to the

simulation of scintillation light in DUNE and SBND.

  • This talk will give a quick update on the

hardware side:

– towards foil installation in SBND. – status in DUNE.

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SLIDE 3

06/03/19

  • A. M. Szelc @ DUNE UK

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Foils in SBND

  • Wavelength-shifter

covered reflector foils placed on the cathode will improve uniformity and light collection efficiency.

  • UK-proposed and led

activity.

  • Production of

components now complete.

  • Installation in CPA in the

spring.

APPROVED

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06/03/19

  • A. M. Szelc @ DUNE UK

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Foils

  • 0.032” (~0.8 mm) thick FR4 (resin-

impregnated fibreglass)

  • The reflector foils are produced by

laminating 3M DF2000MA (~99% reflectivity) onto both sides of the FR4 (38 μm).

  • 64 plates are required (4 per CPA

window).

  • TPB Evaporations split between

Manchester and Brazil.

  • Principle: TPB wavelength-shifts

VUV light, which is then reflected and can be detected by PMTs.

4

Stolen from V. Basque SBND talk.

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  • A. M. Szelc @ DUNE UK

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First foil!

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  • V. Basque

August 2018

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SLIDE 6

06/03/19

  • A. M. Szelc @ DUNE UK

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Feb/March 2019 50 foils Feb 2019 31 foils

In total, the foil will have accumulated over 24000 miles points!

  • V. Basque
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SLIDE 7

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  • A. M. Szelc @ DUNE UK

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UK foil making team

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SLIDE 8

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  • A. M. Szelc @ DUNE UK

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Towards DUNE

  • The main questions are:

– Compatibility with the HV system. – Sensitivity of light detectors (ARAPUCA/X-

ARAPUCA) to visible light.

– Need to understand engineering and installation

procedures (work being performed by the HV consortium).

Clark Griffith, Sussex Surface resistivity also ridiculously high. (Y. Ramachers, Warwick)

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SLIDE 9

Towards DUNE

  • The main questions are:

– Compatibility with the HV system. – Sensitivity of light detectors (ARAPUCA/X-

ARAPUCA) to visible light.

– Need to understand engineering and installation

procedures (work being performed by the HV consortium).

Clark Griffith, Sussex Surface resistivity also ridiculously high. (Y. Ramachers, Warwick)

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SLIDE 10

06/03/19

  • A. M. Szelc @ DUNE UK

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How to mount foils

  • n the CPA
  • The goal is to minimize the impact on the CPA construction. The reflector

foils could be implemented post CPA production.

  • Current solution is to maintain the current CPA design, and include a set
  • f attachment holes on each CPA resistive panel to allow the installation
  • f reflector foils in smaller tiles on both sides of the CPA surfaces in the

UG cleanroom.

10

From Bo Yu, and Francesco Pietropaolo

Potential distribution on a 1cm square cell with 5mm

  • hole. The maximum

voltage at the corners of the cell is 290V.

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SLIDE 11

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  • A. M. Szelc @ DUNE UK

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Effect of foils

Assuming 2.5% ARAPUCA efficiency. Applying measured transmittance of TPB coated glass Keeping 50%

  • f detectors not

covered in WLS to improve uniformity. (not best case scenario) Assuming 80% cathode coverage (potentially conservative)

  • O. Bazavan,
  • V. Griguta,

Manchester

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  • A. M. Szelc @ DUNE UK

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Tests at CERN test stand (Foil – CPA, HV Compatibility)

  • First run of CERN 50 l dewar in

December with full non-perforated foil.

  • Look for discharges and space-charge

effects.

  • Plan to repeat with perforated foil and

PEN soon.

CPA plate with Glued on Reflective foil.

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SLIDE 13

06/03/19

  • A. M. Szelc @ DUNE UK

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Preliminary Results

  • P. Green
  • B. Bilki
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SLIDE 14

06/03/19

  • A. M. Szelc @ DUNE UK

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Conclusions

  • SBND foil production complete. Installation in

a few months.

  • Foils on cathode are one of the options

considered by the DUNE PDS consortium (photon collection boosters) and are in TDR.

  • UK groups involved in DUNE PD Consortium:

Edinburgh, Manchester, Sussex, Warwick.

  • R&D to develop mounting method in DUNE
  • ngoing.
  • Lots of places to get involved.
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SLIDE 15

06/03/19 A.M. Szelc, UK-LA Workshop, Campinas 15

Save the date, Details coming soon. LIDINE 2019

Manchester, UK 28-30, Aug, 19

Light Detection in Noble Elements