CKOV-1%20PROGRESS

1
CKOV-1 PROGRESS

• L. Cremaldi, D. Summers,
• R. Godang, M. Reep, B. Rankins
• U. Mississippi
• MICE MEETING- Frascati
• JUNE 25, 2005

2
CONCEPT

• Simple Design, PID Redundancy, Immune to Decay
  in Flight.
• Aperture based on Tom Roberts beam spread plots
  at
• CKOV1. Sizing the radiator aperture at R 230mm.
• The window will be fused silica 1/8-1/4 inch or
  UV
• transmitting glass (Suprasil, etc. ).
• Light collection by 4 flat triangular mirrors
• 4 x 8 PMTs ( cones??) - Baseline.
• Light collection studies underway to determine
  mirror
• type (focusing/flat), position etc. -
  RayTracing.
• Radiator for p 240-280 MeV/c challenging!
• C6F14(n1.25), LN2(n1.205), Aerogel(n1.12)
  under study.
• G4MICE cross checks by Steve Kahn important.

3
MUON BEAM at CKOV1
Accepted muons
23cm
Accepted muons
23cm
4
BaseLine Design
5
Radiators and Momentum Thresholds
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CKOV1- Monte Carlo 10 cm FC72 Radiator (n1.25)
at 240, 280 MeV/c
240 MeV/c 10 cm FC72
280 MeV/c 10 cm FC72
pions
pions
muons
muons
79
126
134
170
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CKOV1- Monte Carlo 10 cm LN2 Radiator (n1.20 )
at 240, 280 MeV/c
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CKOV1- Monte Carlo 10 cm AEROGEL (n1.12)
Radiator at 240, 280 MeV/c
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HIGH INDEX AEROGEL INQUIREY - Matsushita
Hello I'm interested in some high index (n1.08
and n1.12) aerogel tiles. Might you be able to
supply such a product? Best Regards, Don
Summers, Ph.D.
Dear Prof. Don Summers Thank you for your
inquiry for our silica aerogels. My name is
Hiroko Hasegawa, in Matsushita Electric Works,
Ltd. We don't have any products of high index (
n1.08 and 1.12 ) aerogel tiles. On the other
hand, we could develop them if you would require
more than 10 liters and the price could be
matched. However, they should not be transparent
(clouded or translucent). We hope to hear from
you. Sincerely yours, Hiroko Hasegawa
Hiroko
Hasegawa Coating Business Promotion Group New
Business Promotion Department Matsushita Electric
Works, Ltd 1048 Kadoma,Osaka,571-8686 Japan ltTELgt
81-6-6906-2018 (MIC8711-2104) ltFAXgt
81-6-6904-4457 ltAddressgt hhasegawa_at_mewe1.mewnet.o
r.jp
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LN2 CONCEPT
Muon hodoscope

• Cryo Engineering
• Foam Insulation
• Vaccuum Windows
• Humidity Control
• N2 Flush
• Thermal Radiation?
• P ? (TLn24 - Tbox4 )

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Ray Tracing
2 bounce

• MIRROR SEGMENTATION and LIGHT COLLECTION BAFFLES
  BEING STUDIED.

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LIGHT COLLECTION at PMT SURFACES
1
1
2
4
?geo50
3
2
250 MeV/c Muons LN2 Beam spread
3
4
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LIGHT COLLECTION OPTIMIZATION
35o
Tilting Wing Mirrors by 35o in each quadrant-
Poor Mans Focusing.
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PRELIMINARY EFFICIENCY SCAN
90
x-position (cm)
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SUMMARY

• Further Scrutiny of 4- Mirror Baseline Design.
• Efficiency Scans - Promising - Further studies.
  
• High Density Aerogel a good choice 240-280
  MeV/c.
• -but poor Transparency !!
• LN2 New Baseline for (240-280) MeV/c!
• Some advantage to adding Muon Position Hodoscope
• in PID Reco Algorithm.
• RayTracing Optimization of Mirror and PMT
  Components
• In Progress.
• Test Beam in Fall 05.
• Performance Tests in G4-MICE.
• Full Design by Jan 06. Mechanical Drawing etc.

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Radiators and Momentum Thresholds
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