High Resolution Neutron Detection by the (y)TPC method · 2018. 5. 17. · 1 GbE or DDTC to SRU...

Markus KöhliPhysikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-UniversitätBonn

F. P. Schmidt, M.Gruber J. Kaminski, K. Desch

High Resolution Neutron Detectionby the (y)TPC method

International Workshop on Position Sensitive Neutron Detectors 201817.05.2018

1

[1] http://www-alice.gsi.de

Jalousie (Powtex) CASCADE (Reseda/Mira)

- ToF Diffractometer - - Spin Echo-

Physikalisches InstitutRuprecht-Karls-UniversitätHeidelberg

The Time Projection Chamber2


2

ReadoutE-Field


The Time Projection Chamber

The Neutron TPC Trigger3

Neutron

The Neutron TPC Trigger3

Neutron

Trigger

Track

&

The Neutron TPC4

(not to scale)

The Detector

The Neutron TPC5

The Neutron TPC: BODELAIRE5

Field Cage Design6

Boron Carbide Boron Nitride Boron

Reflector

Scintillator

Lightguide

Reflector

Field Cage Design6

Boron Carbide Boron Nitride Boron

Reflector

Scintillator

Lightguide

Reflector

Simulation: Electric Field Homogeneity

The TimePix Chip7

The TimePix Chip7

- 256 × 256 pixels @ 55 × 55 μm²- 1.4 × 1.4 cm²- 40 MHz clock- ENC ca. 90 e-

The TimePix Chip7

- 256 × 256 pixels @ 55 × 55 μm²- 1.4 × 1.4 cm²- 40 MHz clock- ENC ca. 90 e-

Modes:- Time Over Threshold (TOT)- Time of Arrival (ToA)- Geiger Counter

TimePix Readout System8

Scalable Readout System

Hybrid HDMI cable Adapter card + FEC Ethernet Switch Ethernet PC

SRU

or


Scalable Readout Unit

Virtex-6

10 GbE SFP+

40x DDTC from FECs

FECv6 (2013)

1 GbE or DDTC to SRU

Virtex-6



Virtex-6

10 GbE SFP+

40x DDTC from FECs

FECv6 (2013)


Front-end ASICS implemented in SRS:• APV25, • VFAT, • Timepix, • Beetle, • [Timepix3], • [VMM3]

Virtex-6




Virtex-6

10 GbE SFP+

40x DDTC from FECs

FECv6 (2013)

Front-end ASICS implemented in SRS:• APV25, • VFAT, • Timepix, • Beetle, • [Timepix3], • [VMM3]

Virtex-6

[1] Detection and imaging of high-Z materials with a muon tomography station using GEM detectors Gnanvo, K., et al. Nuclear Science Symposium Conference Record (NSS/MIC), 2010 IEEE. IEEE, 2010.

[1]


[1] M. Lupberger, The Pixel-TPC – A feasibility study, Thesis 2016[2] H. Muller, RD51 SRS Status December 2016, CERN


[1] M. Lupberger, The Pixel-TPC – A feasibility study, Thesis 2016[2] H. Muller, RD51 SRS Status December 2016, CERN

Octoboard:

LCTPC Event Display10

[1] http://newsline.linearcollider.org

[1]

Detecting Neutrons

Test Detector11

Test Detector11

μTPC

Track Topology12

Pitch: 1.56 mmSiemsens Star Resolution: 1.4 mm

12

Sim:Li

Sim:He

Track Topology

Neutron Conversion Tracks13

Neutron Conversion Tracks13

5-23 % Time Pixel (Random Pattern)

Event Example: Lithium14

Spatial Projection

Time Projection

Event Example: Helium15

Spatial Projection Time Projection

Analysis and Results

Energy Loss in Gas16


Sim:Li

Sim:He


Li

He

Spatial Projection

Sim:Li

Sim:He

Energy Spectrum17

Charge [MeV]

Charge [MeV]

Folded with 25 % FWHM

Simulation: 1 μm Layer of Boron

Li

He

Energy Spectrum17

Charge [MeV]

Charge [MeV]

Folded with 25 % FWHM

TOT Spectrum (fiducialized)

Li

He

Simulation: 1 μm Layer of Boron

Spatial Resolution18

Boron Sheet

Drift Gap: 3.8 cm


1 cm


Boron Sheet

1 cm


Pixel

Edge Projection

1 cm


Spatial Resolution σ(95 +/- 4) μm

@ 315 V – 385 V

Pixel

Edge Projection

1 cm

SummaryMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

High Resolution Neutron DetectionThe Neutron Time Projection Chamber

BODELAIRE




Bonn

BODELAIRE Trigger & Track Principle





Bonn


Using both conversion products





Bonn


Combination of gaseous tracking detector [TimePix]and a photo sensitive detector [SiPMs]






Bonn






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[ ]




Bonn






High Resolution Neutron Detection by the (y)TPC method · 2018. 5. 17. · 1 GbE or DDTC to SRU...

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