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

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 %

Spin Echo Measurements

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 %

Spin Echo Measurements

Typical Spin Echo group

time

space

100 kHz x16

Graphite

Sample

11

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %

Spin Echo Measurements

Typical Spin Echo group

time

space

100 kHz x16

Graphite

Sample

11

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %

Spin Echo Measurements

Typical Spin Echo group

time

space

100 kHz x16

Graphite

Sample

11

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %

Spin Echo Measurements

Typical Spin Echo group

time

space

100 kHz x16

Graphite

Sample

11

Spin Echo Measurements

time

100 kHz x16

12

Phase View

Spin Echo Measurements

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 %

Spin Echo Measurements

Typical Spin Echo group

space

Graphite

Sample

13

8000

7000

6000

5000

4000

3000

2000

_cou

nt_

1.41.21.00.80.6

_B 3_

Polarisation 69.6 %

Spin Echo Measurements

Typical Spin Echo group

space

Graphite

Sample

13

BASTARD & BODELAIRE

GEM

14

To New Shores

CiPixMultichannelASIC

CASCADEUni Heidelberg

Technology available in 2000

CASCADEUni Heidelberg

Technology available in 2000

New ProjectUni Bonn

Technology available in 2017

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

The BASTARD System15

5

Kapton

Strips

BoronDrift Field

Gas Gain

The BASTARD System15

5

nXYterPrototype:

M. LiebigUni HD2015

Kapton

Strips

BoronDrift Field

Gas Gain

The BASTARD System16

5

Pitch :280 μm

10 cm x 10 cm

The BASTARD System16

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?

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

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

What can 10Boron based detectors offer?

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

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

What can 10Boron based detectors offer?

BASTARD (high rate, good resolution)

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

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

What can 10Boron based detectors offer?

BASTARD (high rate, good resolution)

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

BODELAIRE (high resolution)

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

What can 10Boron based detectors offer?

BASTARD (high rate, good resolution)

Summary & OutlookMarkus Köhli

Physikalisches Institut (LCTPC)

RheinischeFriedrich-Wilhelms-Universität

Bonn

BODELAIRE (high resolution)

to be continuedT. Wagner & F. Schmidt