KEK Beam Test Analysis Update

KEK Beam Test AnalysisUpdate

Hideyuki Sakamoto

MICE Tracker WorkshopImperial College London

07/04/2006

Contents

• Mapping– Mapping check using Aron’s information– Version12: Result by checking with beam data– Version13: Result by Aron’s check

• Efficiency study– This is almost same as presented at CM14

Mapping

Summary of mapping checkwith Version12 and Version13

Residual distribution at inconsistency case

Summary & Discussion

Summary of mapping

Station View D0 connector# Channel# Fiber# Status

A X 3 2526 4344 Swapped by1

A X 2 56 149150 Swapped by1

B V ALL ALL ALL Reversed

B X ALL ALL ALL Reversed

B W ALL ALL ALL Reversed

B W 8 9799 115117 Swapped by 2

C X 4 121 67 Skipped by 1

C X 4 124125 6970 Swapped by 1

C X 4 CX3,CX9,CX11 CX3,CX9,CX11 Reversed

C W 109110 Swapped by 1

D V 86 Skipped by 1

D X 102103 Swapped by 1

Version12 = Version13Version12 ≠ Version13Only in Version12

Station:B View:WVersion12 Version13

?

115117

Station:C View:XVersion12 Version13

?

67 & 6970

Station:C View:WVersion12 Version13

?

109110

Station:D View:VVersion12 Version13

?

86

It seems offset …

Station:D View:XVersion12 Version13

?

102103

Summary & discussion

• Mapping table of version13 is created by data from Aron’s check– For station D, I am now asking to him whether there w

as alignment error or not. If there is no error at station D, version13 is correctly affected by Aron’s data.

• Some of data at v.13 is matching with v.12, but not for all. I’m not sure why…There is an error at conversion of Channel#(1-128)Fiber#(1-220)?

Efficiency study

Checking schemeLight yield (DATA)

Summary & Discussion

Checking Scheme

• Efficiency is determined by residual distribution after linear fitting

• Efficiency is defined by N1/N2– N1: # of events within residual cut– N2: # of events after event selection

• Only X-View is studied, because there is only 2 points for V&W-view for fitting.

BEAM

3 GeV/c 3 GeV/c

D C A B

• PID– Using TOF of D1&D2

• L1A cut is – 860 - 900 [nsec]

For all Station

Event Selection

StationB StationA

StationC StationD

L.Y. 　 vs 　 L1A

Efficiency -MC

Station#Station# BB AA CC DD

[email protected]@0.5mm 26%26% 62%62% 56%56% 65%65%




90%

BEAM

3 GeV/c 3 GeV/c

• Efficiency is calculated by

simulating for each station.

D C A B

AB

C D

B

A

C

D

Station

Residual distri. & efficiency （ DATA ）

Station BStation B Station AStation A

Station DStation DStation CStation C

X view

Station#Station# 　　 (X-view)(X-view) BB AA CC DD

Efficiency by residual Efficiency by residual cut(%)cut(%)

90%90% 98%98% 97%97% 92%92%

Data (%)Data (%) 80%80% 86%86% 86%86% 80%80%

cm

Light yield distribution (DATA)

• Efficiency is changedaccording to its’ light yield• L.Y. cut in this study is

– 2.5 p.e. for all

• StationB (Xview)– 8.1 ± 0.1 p.e.

• StationA (Xview)– 10.2 ± 0.1 p.e.

• StationC (Xview)– 8.8 ± 0.1 p.e.

• StationD (Xview)– 5.3 ± 0.1 p.e.

Station BStation B Station AStation A

Station DStation DStation CStation C

X view

Efficiency （ MC ）　 vs L.Y.

Threshold (p.e.)Threshold (p.e.) 0.5 0.5 1.5 1.5 2.5 2.5 3.5 3.5

光量カットの Efficiency (%) @ 9 p.e. (%) @ 9 p.e. 99.799.7 98.9 98.9 97.097.0 94.194.1

Poisson probability (%) P ( Poisson probability (%) P ( =9, =9, n>threshold)n>threshold)

99.9999.99 99.8899.88 99.3899.38 97.8997.89

Efficiency -DATAStation#Station#　　 (X-view)(X-view) 11 22 33 44

Efficiency by res. Cut E1(%)Efficiency by res. Cut E1(%) 90%90% 98%98% 97%97% 92%92%

Efficiency by L.Y. cutE2(%) 94%(8pe) 98%(10pe) 97%(9pe) 83%(5pe)

E1xE2 (%)E1xE2 (%) 85%85% 96%96% 94%94% 76%76%

Data (%)Data (%) 80%80% 86%86% 86%86% 80%80%

Efficiency (DATA) VS FIBER#

Station1Station1 Station2Station2

Station4Station4Station3Station3

• Efficiency:

• L.Y. for each view is matched with DATA.• L.Y. for each fiber for each view is estimated

to estimating more correctly

Summary & discussion

Station# (X-view) B A C D

Expect (%) 85% 96% 94% 76%

Data (%) 80% 86% 86% 80%

Documents

KEK Beam Test Analysis Update