PID activities

1
PID activities
Gh. Grégoire
1. Summary of work/activities since last CM in
Berkeley
2. PID parallel session in Frascati
3. Topics specific to each subdetector
TOF
CKOV1
CKOV2
EmCal
4. Issues common to all PID systems
MICE collaboration meeting CM12, Frascati 28 June
2005
2
Phone meetings
Since the PID summary talk at Berkeley in 14-17
Feb. 2005, we held phone conferences about PID on

• March 1

Losses in the cooling channel
DesignSafety issues

• March 31

CKOV1
TRD update

• April 13

TOF
DS status

• May 2

Losses in the end system vs beam emittance
Implementation of CKOVs in G4MICE

• May 11

Tuning EmCal cuts CKOV2 photon collection
CKOV1 design ideas
CKOV2 photon collection

• May 25

Task milestone tables
EmCal response

• June 15

DS updates Milestone tables
CKOV2 electron efficiency
CKOV1 design issues
2
Emcal simulation
3
PID sessions in Frascati
Gh. Grégoire
1. Parallel session on Sun 26 Jun
CKOV1
L. Cremaldi
TOF
M. Bonesini
CKOV2
GG
MuCal theory
R. Sandström
MuCal practice
L. Tortora
PID in G4MICE
S. Kahn
2. Plenary session on Mon 27 Jun
A. Tonazzo
EmCal summary
TOF
M. Bonesini
3. Parallel session on Mon 27 Jun pm (software)
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4
Conclusions of CM 11
1.
2.
3.
4.
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Followup from CM 11
1. PID updates of the TRD
This is rather well advanced
Thanks to P. Drumm, the structure of the TRD
chap. 8 has been divided into subsections to
allow for easy modifications by the various
groups.
2. Realistic drawings of the subdetectors
Converging process underway although time is
passing by and audit/construction deadlines
seriously approach
3. Tools for the final design
 Field maps, Geant4 particle files, full
re-evaluation of the performances 
All are either available or well underway
although there are sometimes difficulties to
reach the PID requirements of MICE
4. Requirements for DAQ Controls
Happy to see it progressing !
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6
TRD
CKOV1
DAQ controls
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TOF
Conclusions presented by Maurizio Bonesini

• design for TOF stations well understood
• only some points to be defined connected with
  choice of size of TOF1/TOF2 PMTs (1.5 vs 2) and
  divider for TOF0 PMTs (booster vs active divider)
• define electronics chain (TDC for high incoming
  rate) probable choice CAEN V1290
• define the high-demanding calibration system
  (mainly laser based)
• test a prototype asap at LNF BTF, together with
  EMCAL

Including detailed cost estimates
6
8
Questions/comments raised about TOFs

• Possibility to reduce the vertical size of TOF0 ?

Reducing its thickness
While keeping a good light collection
It needs beforehand a full understanding of the
beam spot at the position of TOF0

• What about the rate capabilities of the PMTs
  and the proposed electronics with random hits
  instead of uniformly time-spaced laser pulses?

(Associated Dead time ?)
P. Soler proposal to perform  real
world   tests in the synchrotron vault at RAL

• Why using a complicated laser system for
  calibration ?

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9
CKOV1
Talk presented by Lucien Cremaldi
Two conceptual designs presented
8
10
The quest of a radiator
Range of indices to get it pion blind at 300 MeV/c
9
11
Questions/comments about CKOV1
But the responses for pions and muons overlap at
the high-momentum end for all  reasonable 
radiators

• for not commercially available materials (like
  aerogel with n1.12)

except

• cryogenic liquids (Liq. H2 with n1.123)
  bringing their own (big) set of problems

Smaller indices
Smaller light yield
Aerogel n1.12
Light collection
in addition to the challenging engineering,
safety and operation issues
10
12
Simulation of CKOV1
Talk presented by Steve Kahn
11
13
CKOV1 efficiency
P?240 MeV/c
Light collection efficiency or particle detection
efficiency ?
12
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CKOV2
Talk presented by GG
13
15
CKOV2 performance
Everything is summarized in the electron
detection inefficiency table
Electronic Threshold (p.e.) n 1.02 n 1.04
0 0.002 0.002
1 0.011 0.003
2 0.214 0.025
3 0.513 0.146
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Questions/comments about CKOV2
On behalf of Captain Vittorio

• Study of electron detection efficiency based on
  Toms particle files

• Mechanical/optical design understood and
  optimized (hopefully)

1. Choice of a good internal geometry
2. Proposal to use n1.04 aerogel

• Simulation nowhere, not yet started

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EmCal
Talks presented by A. Tonazzo, L. Tortora
Detailed descriptions from concept, to design,
construction and simulation
Including detailed cost estimates
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EmCal simulation and performances
Talk presented by R. Sandström
10p mm rad emittance
Muon momentum centered around 200 MeV/c ( ? 30
MeV/c)
NN training
Assumption target efficiency gt 99.9 purity gt
99.8 Achieved!
Performance for subsystems
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Questions/comments about EmCal

• The simulation should be extended up to muon
  momenta as high as 300 MeV/c.

• The beam particles should come from a full
  simulation of the MICE beam line.

• Influence of the fibre free zone at the edges of
  adjacent modules/sectors

• Does the inclusion of CKOV2 input improve the
  PID performances at higher momenta ?

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Issues common to all PID systems
1. Full documentation and update of the TRD
Certainly easier today for TOF, CKOV2 and EmCal
2. Internal audit regarding designs and safety
It is an integral and unavoidable duty for the
acceptance of our designs
Milestone tables, GANTT charts, supports, DAQ
building elements, ancillaries (cables, access,
supports)
Many most helpful persons are at hand and willing
to help you !
3. ...before going before the (external) RAL
audit committee and getting hopefully a green
light for construction
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