Development of Silicon Strip Detector for the measurement of Ξ-atom X-rays

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Development of Silicon Strip Detector for the measurement of Ξ-atom X-rays Hitoshi Sugimura Kyoto University (For E03 collaboration)

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Development of Silicon Strip Detector for the measurement of Ξ-atom X-rays. Hitoshi Sugimura Kyoto University (For E03 collaboration). C ollaborators. SNU Kiyoshi Tanida Ryuta Kiuchi Joo Chang Woo JAEA Ken’ichi Imai Hiroyuki Sako Susumu Sato - PowerPoint PPT Presentation

Transcript of Development of Silicon Strip Detector for the measurement of Ξ-atom X-rays

Page 1: Development of Silicon Strip Detector for the measurement of Ξ-atom X-rays

Development of Silicon Strip Detector for the measurement

of Ξ-atom X-raysHitoshi SugimuraKyoto University

(For E03 collaboration)

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SNU Kiyoshi Tanida Ryuta Kiuchi Joo Chang Woo JAEA Ken’ichi Imai Hiroyuki Sako Susumu Sato KyotoU Hitoshi Sugimura Satoshi Adachi Hidemitsu Asano RCNP Tomoaki Hotta

Collaborators

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J-PARC E03 experiment

Fe

K- K+

1.8GeV/cp

FeΞ-

X-ray

Ge-Detector

drrUrE )(|)(|2

Strong Interaction makes Energy Shift

We detect X-ray from Ξ-atom by using Ge-detector for the first time.Energy shift provides information of ΞN interaction.

FeΞ-

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J-PARC E03 experiment

Fe

K- K+

1.8GeV/cp

FeΞ-

FeΞ-

X-ray

Ge-Detector

drrUrE )(|)(|2

Strong Interaction makes Energy Shift

1-step ,We detect X-ray by using Ge-detector.How to detect X-ray from xi atom is first challenge And 2-step make sure that how much energy shift. Make us information to ΞA interactionExpected Energy Shift (Simulation)

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Detector Set up

Target

SSD

SSD

SSD measures Ξ track and dE/dx to select slow Ξ so that better S/N ratio will be obtained for stopping Ξ.

K-K+

KURAMA magnetHyperball-J

target

K-

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Thickness ~300um Effective area 6cmx6cm Pitch 80um x 768 strips Read out chip : APV25 128ch readout /1chip Shaping time 50nsec Serial Data Transfer Radiation tolerance checked up to 3x1014protons /cm2

At 108Hz beam, efficiency is accomplished up to 96%

Silicon Strip Detector (SSD)

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K

計 12 面  768ch

Beam Test at J-PARC K1.8 beamline

SSDSSD SSD

Target (inside of cryostat)

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Wave analysis

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Time resolution and S/N

•Reconstruct pulse height by wave form analysis.

We have achieved SNR>10

MIP signalNoise level

S/N=

=17.0

•Reconstruct Hit Timing

If 107Hz beam , probability accidental hit is 13.6% Good enough to identify ghost tracks.

σ=3.61ns

σ=3.61ns

time

S/N

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SSD has been developed for E03 which detect X-ray from Xi atom for the first time .

SSD has been tested at J-PARC K1.8 beamline.

We have obtained S/N = 17 and time resolution is 3.61ns which is sufficient for E03 experiment.

Summary

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Back up

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  Hyperball-Ja new Ge detector array

Hyperball2 ( ε ~4 % for 1 MeV)can not be used @J-PARCdue to high count rate & radiation damage → Need new Ge detector array

Lower half of Hyperball-J PWO counterGe detector

Pulse-tube cooler

Target

Features Radiation-hard Ge detector

→ Mechanical cooling

Fast background suppressor → PWO counter

Pulse-shape readout and analysis

Adjustable detector geometry

Large photo-peak efficiency → ε ~6.1 % @1 MeV with 32 Ge detectors

Remotely controlled and monitored

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K1.8 beamline for KURAMA setup

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Raw Signal

signal