high spatial resolution in thermal neutron detection: from … · the cascade concept gem (gas...

Markus KöhliPhysikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-UniversitätBonn

M. Klein, U. Schmidt (Uni Heidelberg)T. Wagner, F. Schmidt, J. Kaminski, K. Desch (Uni Bonn)

DPG Frühjahrstagung Münster27.03.2017

High Spatial Resolutionin thermal Neutron Detection:

from CASCADE to BASTARD

Neutron Capture

5

30 meV

Neutron

1

Nuclear Absorption

The Helium-3 Crisis

5

AAAS, Overview of Helium-3 Supply and Demand

2

The Helium-3 Crisis

5

9/11

[1] http://www.saphymo.com/photos/ecatalogue/116-2/access-control-clearance-monitors-rcp-radiological-control-for-pedestrian.jpg

[2] http://cits.uga.edu/uploads/1540compass/1540images/_compass750/RPM1.jpg

AAAS, Overview of Helium-3 Supply and Demand

[1]

[2]

2

The European Spallation Source3

ESS TDR 2013Lund, Sweden

Linear Accelerator2 GeV

3 ms Pulse62.5 mA

ESS Instrumentation

ESS TDR 2013

3

ESS Instrumentation

5

3

ESS TDR 2013

The Detector

Heidelberg University

CASCADE detector without housing

The CASCADE Detector4

CASCADE detector without housing

The CASCADE Detector

Readout

Electronics

Active Detection Volume

6 layers of Boron-10

128x128 crossed stripes @ 1.56 mm

5x CIPix 64ch @ FPGA 10 MHz

4

DAQ

Firmware based event reconstruction

The CASCADE Concept

Thin (Boron) Layer

Readout

Casing

5

charge transparent substrate

The CASCADE Concept

Casing

Thin (Boron) Layer

Readout

5

The CASCADE Concept

GEM(Gas Electron Multiplier foil)

5

The CASCADE Concept

c

c cc

5

The CASCADE Concept5

Spatial Resolution

Image of a cold neutron beam (after guide)

Cadmium sheet

Log (In

tensity

)

@RESEDA FRM II

Spatial resolution: 2.4 mm FWHM

8

2.5

mm

Spin Echo

Spin Echo - MIEZE10

Spin Echo - MIEZE

Sample

10

Spin Echo Measurements

RESEDA, FRMII: spectrometer arms

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %

3 – 15 Å @ 11% FWHM

space

11

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %


Typical Spin Echo group

space

Graphite

Sample

11

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %



time

space

100 kHz x16

Graphite

Sample

11


time

100 kHz x16

12

Phase View


time

100 kHz x16

12

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %



space

Graphite

Sample

13

BASTARD & BODELAIRE

GEM

14

To New Shores

CiPixMultichannelASIC

CASCADEUni Heidelberg

Technology available in 2000

CASCADEUni Heidelberg


New ProjectUni Bonn


GEM

CiPixMultichannelASIC

TPC

TimePix

VMM ASIC

14

To New Shores

15

5

High Resolution

High Rate

To New Shores

BASTARD

BODELAIRE

The BASTARD System15

5

Kapton

Strips

BoronDrift Field

Gas Gain


5

nXYterPrototype:

M. LiebigUni HD2015

Kapton

Strips

BoronDrift Field

Gas Gain


5

Pitch :280 μm

10 cm x 10 cm


5

• 4 MHz/ch• 10bit ADC• self triggered• 400 e- noise• 1 ns time resolution

VMM12011/12

VMM22013/14

[1] G. Iakovidis, RD51 MiniWeek CERN, Feb. 2017[2] H. Muller, RD51 SRS Status December 2016, CERN

[2]

[1]

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

What can 10Boron based detectors offer?




Bonn

high rate,spatially and time resolved detectors(for Imaging/Spin Echo applications)





Bonn



BASTARD (high rate, good resolution)




Bonn







Bonn

BODELAIRE (high resolution)







Bonn

BODELAIRE (high resolution)

to be continuedT. Wagner & F. Schmidt

high spatial resolution in thermal neutron detection: from … · the cascade concept gem (gas...

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