analysis of cosmic self triggerd data of station 5
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Analysis of cosmic/self-triggerd data of station 5. Hideyuki Sakamoto MICE Tracker Phone Meeting 20 th April 2007. Contents. Dead channel study by LED calibration run Overview for the mapping problem. PE distribution at each view PE correlation plot between each view Summary Next step

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analysis of cosmic self triggerd data of station 5

Analysis of cosmic/self-triggerd data of station 5

Hideyuki Sakamoto

MICE Tracker Phone Meeting

20th April 2007

MICE Tracker Phone Meeting

contents
Contents
  • Dead channel study by LED calibration run
  • Overview for the mapping problem.
  • PE distribution at each view
  • PE correlation plot between each view
  • Summary
  • Next step
  • Caution: plot :

MICE Tracker Phone Meeting

dead channel study
Dead channel study
  • LED calibration data:
    • http://mice.iit.edu/scratch/20070322/cass105_nombias_ledoff.2.root
  • Check the channel is alive or dead by eye.
    • Alive: can see peaks
    • Dead: cannot see peak or difficult to separate each peak.
  • Check almost of channel.
    • All channel for LHB
    • MCM#1-#2 for RHB

MICE Tracker Phone Meeting

sample alive and dead channel
Sample: Alive and Dead channel

Alive

Dead

  • Common feature on dead channels:
  • Pedestal is large and 1 p.e. is much smaller and more p.e. cannot see peaks.

MICE Tracker Phone Meeting

list of dead channels
LHB

MCM#1: #29-#32

MCM#2: #29-#32

MCM#3: #22,#27,#29-#32,#35,#37,#44

MCM#4: #29-#32

MCM#5: #29-#32

MCM#6: #29-#32

MCM#7: #29-#32

MCM#8: #29-#32

RHB

MCM#1: #23-#64

MCM#2: #29,#33-#36

MCM#3: under checking

MCM#4: under checking

MCM#5: under checking

MCM#6: under checking

MCM#7: under checking

MCM#8: under checking

List of dead channels

MICE Tracker Phone Meeting

pe correlation between each view
PE correlation between each view

TOP: Before modifying the code

Bottom: After modifying the code

Pe @W

C

A

B

D

0

Pe @X

A: detected correctly

B: did not hit for both

C/D: one has hit another did not.

C/D region is still too much…

This did not solve the problem…

MICE Tracker Phone Meeting

pe distribution at each view
PE distribution at each view

TOP: Before modifying the code

Bottom: After modifying the code

  • Amount of pedestal
    • The plot is created using a hit of max. p.e. at each view.
    • Not summation of all fibers at each view.
    • So, if it is assumed that muon is surely passing through station,
    • Then, it corresponds to hit efficiency.
    • But for now, of course we cannot estimate it by using wrong mapping.

MICE Tracker Phone Meeting

pe distribution at each view cnt d
PE distribution at each view (cnt’d)

The reason is very easy to understand.

Please image that some event has 3hits at each views, A, B, C.

If the mapping between views is wrong, then max. light yield channel is selected among the rest of pedestal.

Correct mapping

Wrong mapping

X view – 98ch

X view – 98ch

A

B

C

V view – 100ch

V view – 100ch

W view – 102ch

X view – 90ch

W view -103ch

This is Pedestal

MICE Tracker Phone Meeting

mistake between view
From the slide#3, we can see mapping error between views.

Each view are (almost) separated by the D0 connector (#1-#8)

So, the mistake between views corresponds to the mistake between MCMs.

It suggests that mapping error is happened at the electrical part, Inside of AFE or outside of AFE.

#1

Waveguide #1

#2

V view

#3

Waveguide #2

#4

Waveguide #3

#5

X view

#6

#7

Waveguide #4

#8

W view

Waveguide #5

Mistake between view?

Back plane side

LHB

RHB

MICE Tracker Phone Meeting

plotting maximum light yield within all channels on the cassette
Plotting Maximum light yield within all channels on the cassette.
  • Final? way for now to checking the signal is seeing the channel of maximum light yield in the cassette. Before selection by view.
  • If only the mapping is wrong within the MCM modules, then we can see the signal by this plot anyway.
    • Cannot separate by view, of course. Just watching signal itself.
    • For this plot, only one fiber of maximum among 3 hits at each view is selected.

RHB

150

#5

#6

#8

#7

#4

#3

#2

#1

LHB, MCM#3 is selected.

160

200

LHB

ADC

MICE Tracker Phone Meeting

before showing pe plot this is one of the most strange plots
#1

Waveguide #1

#2

V view

#3

Waveguide #2

#4

Waveguide #3

#5

X view

#6

#7

Waveguide #4

#8

W view

Waveguide #5

Before showing PE plot…This is one of the most strange plots

In the rule of the readout scheme, MCM# is starting from left side from the front view. This means that MCM# on RHB should be #1, #2, #5,#6,#8. But the result shows the same as LHB.

Back plane side

MCM plot

LHB

MCM

RHB

Problem..

LHB

RHB

MCM

MICE Tracker Phone Meeting

pe distribution
PE distribution

LHB

Pedestal

ratio

Saturated ratio

Signal ratio

RHB

What is this?

If 100% triggering efficiency is assumed, then hit efficiency is roughly estimated by 85% at RHB.

I think small efficiency at RHB is due to timing setup, if RHB is correct within the MCMs.

For LHB, there has still problem….

MICE Tracker Phone Meeting

present status in my mind
Present status – in my mind
  • Mapping problem should have fixed.
  • Yesterday, Malcolm sent email back to Ken, which says that the setup for the external trigger was wrong on the RHB.
  • If it is correct, then strange phenomena shown at slide #8 is due to this!
  • So, we can see correct-decoded data at the next.
    • Coming soon?

MICE Tracker Phone Meeting

summary
Summary
  • Mapping problem should have been fixed and waiting for new samples.

MICE Tracker Phone Meeting

next step
Next step
  • Check light yield and fiber crossing.
  • We can check the all fiber’s output.
  • Timing problem is also argued after mapping is fixed.

MICE Tracker Phone Meeting

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