Inter-Plane Induction Effects (and more...) Tom Junk, Ajib Paudel, - - PowerPoint PPT Presentation

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Inter-Plane Induction Effects (and more...) Tom Junk, Ajib Paudel, - - PowerPoint PPT Presentation

Sep 20, 2022 151 likes •417 views

Inter-Plane Induction Effects (and more...) Tom Junk, Ajib Paudel, Tingjun Yang ProtoDUNE Sim/Reco Meeting December 12, 2018 Ajib did all the heavy lifting. Broken Channels in ProtoDUNE-SP Tingjun Yang, APA Consortium Meeting Nov. 19, 2018

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SLIDE 1

Inter-Plane Induction Effects (and more...)

Tom Junk, Ajib Paudel, Tingjun Yang ProtoDUNE Sim/Reco Meeting December 12, 2018

Ajib did all the heavy lifting.

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SLIDE 2

Broken Channels in ProtoDUNE-SP

12/12/18 Tom Junk | Interplane Induction 2

Tingjun Yang, APA Consortium Meeting

  • Nov. 19, 2018

Broken Channel List from David Adams

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SLIDE 3

Alberto's Request

  • Can we see the effect of the broken collection wires in the V

plane?

  • We expect the potential map to be distorted if the collection-

plane wire is floating

  • Less so if the collection-plane wire is jumpered to its neighbor
  • If a U or a V wire is broken and floating, expect less of an
  • impact. Charge should not collect on a disconnected wire, or on

a connected one.

  • MicroBooNE had a significant effect on neighboring plane wires

due to shorted wires. We have far fewer broken wires and they are isolated. Can we see the impact?

12/12/18 Tom Junk | Interplane Induction 3

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SLIDE 4

The (Proto)DUNE-SP Anode Potential Map

From The LBNE CDR, Vol. 4

12/12/18 Tom Junk | Interplane Induction 4

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SLIDE 5

Ajib's Median dQ/dx U plane (y,z)

12/12/18 Tom Junk | Interplane Induction 5

86000 Events, 1 cm x 1 cm binning APA 1 APA 2 APA 3 Beam Right

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SLIDE 6

Ajib's Median dQ/dx V plane (y,z)

12/12/18 Tom Junk | Interplane Induction 6

APA 1 APA 2 APA 3 Beam Right

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SLIDE 7

Ajib's Median dQ/dx Z plane (y,z)

12/12/18 Tom Junk | Interplane Induction 7

APA 1 APA 2 APA 3 And similarly for APA's 4, 6, and 5 Beam Right

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SLIDE 8

Ajib's Median dQ/dx U plane (y,z)

12/12/18 Tom Junk | Interplane Induction 8

Beam Left APA 4 APA 6 APA 5

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SLIDE 9

Ajib's Median dQ/dx V plane (y,z)

12/12/18 Tom Junk | Interplane Induction 9

Beam Left APA 4 APA 6 APA 5

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SLIDE 10

Ajib's Median dQ/dx Z plane (y,z)

12/12/18 Tom Junk | Interplane Induction 10

Beam Left APA 4 APA 6 APA 5

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SLIDE 11

Projecting These Onto Axes

  • Features are small and expected to be hard to detect.
  • Average the median dQ/dx values along axes:

U = y sin! – z cos ! V = y sin! + z cos ! (swap U and V for APA's 4, 6 and 5) Z Y

  • Do this for each plane's data in each APA:

(U, V, Z) x (1,2,3,4,6,5) x (4 projections) = 72 plots

http://home.fnal.gov/~trj/foralberto/protodune_dqdx_averages/index.html

12/12/18 Tom Junk | Interplane Induction 11

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SLIDE 12

Comments

  • These are the dQ/dx values for hits that are seen, not a count of

missing ones. So an upward spike upwards due to displaced charge is coupled with a downward dip that doesn't show up

  • n these plots.
  • U wires are at constant U. V wires are at constant V. Collection wires

are at constant Z.

  • Cryostat-side wire segments do not contribute (to a good

approximation)

  • Some effects are due to short wires in corners only sampling signals

drifting in corners. These can be in the middle of some plots.

  • Data are sparse on the edges and corners.

12/12/18 Tom Junk | Interplane Induction 12

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SLIDE 13

Some Interesting Ones

12/12/18 Tom Junk | Interplane Induction 13 20 40 60 80 100 120 140 160 180 200 220 Coordinate 50 100 150 200 250 300 350 Average dQ/dx(ADC/cm)

APA: 3 Signal plane: Z Binned in Z APA: 3 Signal plane: Z Binned in Z Stretching due to space charge inhomogeneity Stretching due to grounded electron diverter

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SLIDE 14

Space Charge Position Distortion

12/12/18 Tom Junk | Interplane Induction 14

David Adams's Raw Event Display shows this effect nicely.

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SLIDE 15

Some Interesting Ones

12/12/18 Tom Junk | Interplane Induction 15

100 200 300 400 500 600 Coordinate 50 100 150 200 250 300 Average dQ/dx(ADC/cm)

APA: 3 Signal plane: Z Binned in Y APA: 3 Signal plane: Z Binned in Y

Three Field Cage Rib Pairs Four Wire Support Combs

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SLIDE 16

Wire Support Combs

12/12/18 Tom Junk | Interplane Induction 16

From the ProtoDUNE-SP TDR

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SLIDE 17

Field Cage Ribs and Support Combs

12/12/18 Tom Junk | Interplane Induction 17

From Kevin Wood's Collab Meeting Talk Sep 2018

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SLIDE 18

Track Distortion due to Field Cage Nonuniformities

12/12/18 Tom Junk | Interplane Induction 18

We didn't see this on all tracks – now it makes more sense – these are field cage ribs.

  • D. Adams
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SLIDE 19

One in the middle – no field cage or diverters

12/12/18 Tom Junk | Interplane Induction 19

100 200 300 400 500 600 Coordinate 50 100 150 200 250 Average dQ/dx(ADC/cm)

APA: 6 Signal plane: V Binned in Y APA: 6 Signal plane: V Binned in Y

Just the support comb effects visible

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SLIDE 20

An Induced Effect

12/12/18 Tom Junk | Interplane Induction 20

250 300 350 400 450 Coordinate 200 250 300 350 400 450 Average dQ/dx(ADC/cm)

APA: 2 Signal plane: V Binned in Z APA: 2 Signal plane: V Binned in Z

Electron Diverters on each side Broken collection-plane wire on drift side

250 300 350 400 450 Coordinate 250 300 350 400 450 Average dQ/dx(ADC/cm)

APA: 2 Signal plane: U Binned in Z APA: 2 Signal plane: U Binned in Z

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SLIDE 21

Another Pair of Induced Effects

12/12/18 Tom Junk | Interplane Induction 21

250 300 350 400 450 Coordinate 200 220 240 260 280 Average dQ/dx(ADC/cm)

APA: 6 Signal plane: V Binned in Z APA: 6 Signal plane: V Binned in Z

Two broken channels in Z seen in V but not U

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SLIDE 22

Space Charge Effects

12/12/18 Tom Junk | Interplane Induction 22

100

  • 100

200 300 Coordinate 50 100 150 200 250 300 350 Average dQ/dx(ADC/cm)

APA: 5 Signal plane: Z Binned in V APA: 5 Signal plane: Z Binned in V

Small signals seen in corners. Binning done in U and V, not in channel number

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SLIDE 23

Some Effect of Broken U wires

12/12/18 Tom Junk | Interplane Induction 23

100

  • 100

200 300 Coordinate 50 100 150 200 250 300 Average dQ/dx(ADC/cm)

APA: 3 Signal plane: Z Binned in U APA: 3 Signal plane: Z Binned in U

100

  • 100

200 300 Coordinate 50 100 150 200 250 300 Average dQ/dx(ADC/cm)

APA: 3 Signal plane: U Binned in U APA: 3 Signal plane: U Binned in U

100

  • 100

200 300 Coordinate 50 100 150 200 250 Average dQ/dx(ADC/cm)

APA: 3 Signal plane: V Binned in U APA: 3 Signal plane: V Binned in U

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SLIDE 24

Something Unexpected

20 40 60 80 100 120 140 160 180 200 220 Coordinate 260 270 280 290 300 310 320 330 Average dQ/dx(ADC/cm)

APA: 5 Signal plane: U Binned in Z APA: 5 Signal plane: U Binned in Z

12/12/18 Tom Junk | Interplane Induction 24

20 40 60 80 100 120 140 160 180 200 220 Coordinate 160 180 200 220 240 260 Average dQ/dx(ADC/cm)

APA: 5 Signal plane: V Binned in Z APA: 5 Signal plane: V Binned in Z

Grid wire broken? Seen in U but not V when projected in Z Position not on Tingjun's map

20 40 60 80 100 120 140 160 180 200 220 Coordinate 50 100 150 200 250 300 350 400 Average dQ/dx(ADC/cm)

APA: 5 Signal plane: Z Binned in Z APA: 5 Signal plane: Z Binned in Z

Low Stats ???

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SLIDE 25

Summary

  • More plots (72 combinations) on the web page
  • Not all features are understood yet.
  • Some of the dead wires on David's list cause induced effects on
  • ther planes' signals, but not all. Effects are small
  • Space charge spreads out and lowers dQ/dx.
  • Space charge effects are large.
  • Field cage ribs and combs have small but visible effects

12/12/18 Tom Junk | Interplane Induction 25