CANBERRA Nuclear Measurements Marijke KETERS Director Detector Product Management Hamburg DESY – 27th of March 2012

CANBERRANuclear Measurements

Marijke KETERSDirector Detector Product Management Hamburg DESY – 27th of March 2012

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BU Nuclear Measurements in the AREVA Group

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AIDA 2012 - Workshop DESY


CANBERRA is the Worldwide Leader in Nuclear Measurements

Founded in 1965Headquartered in Meriden, CT 1080 employees and seven manufacturing sites worldwideCANBERRA provides nuclear measurement solutions for safety and security to the

Nuclear power industry, Laboratories and research Fuel cycle facilities Military, non-proliferation and security

applications

Nuclear Power Plants

Fuel Cycle Facilities

Laboratories and research

Safety/Security Safeguards,

Military

Detector design and manufacturing capabilities

HPGe, Silicon (PIPS®) and gas Detectors

4 detector manufacturing entities

France – Lingolsheim

Belgium – Olen

US – Meriden

US – Oak Ridge


Silicon PSD’s


Position Sensitive Silicon detectors

XRD – drug research

Pixel Detectors for Research:

Omega, Medipix1, Medipix2, Medipix3, Alice, LHCB…Detector thickness 200 to 700µm, manufacturing on 5 inch wafers.

Industry: Medipix designs, single and Quad, 55x55µm² , 65000 pixels, 300 µm thick, manufacturing on 6 inch wafers

Double Sided Strip detectors Detector thickness 200 to 1000µm. Low leakage current: ex. typical

leakage current per 40mm² pad, 1000µm thick < 10nA

Thin window <50nm


PSD’s by resistive charge sharing Thin entrance window for charged particles analysis. The junction is a resistive electrode with two contacts.

The position information is given by charge division measured on the contacts.

Used for super heavy ion detection (element 112, 114, 116, …) at GSI, DUBNA, RIKEN, Jyvaskyla, Berkeley


• A total qty of 400 silicon drift detector with an active area of 7.5 x 7.0 cm² have been designed, produced and tested for ALICE inner tracking system. (15 years of development work)

• Spatial resolution of 30µm obtained - 256 anodes - pitch 294 µm.

Segmented Silicon Drift Diodes (SSDD)


Silicon Drift Diodes (SDD)

0 1 2 3 4 5 6 7 8 9 10130

140

150

160

170

180

190

200

210

Rise time (µs)

FW

HM

(e

V)

195 eV @ 500kCPS OCR

160 eV @ 180kCPS OCR

80mm² collimated, 500μm thick 15mm² collimated, 500μm thick

Preamplifier (Reset type )Extremely good linearity at high count rate

Large volume productionIndustrial manufacturing site

Full manufacturing controlinternal SDD production

0 200,000 400,000 600,000 800,000 130

140

150

160

170

180

190

200

3.2µs

2µs

1µs

0.6µs

0.4µs

ICR (cps)

Res

olu

tio

n e

V (

FW

HM

) @

5.9

keV


High Purity Ge PSD’s


Segmented CoaxialHPGe Detectors for gamma tracking

Highlights : Tracking capability by optimized

pulse shape without unwanted crosstalk effects.

High granularity with even smaller possible “virtual” segments through pulse shape analysis in neighbor segments.

No heat cycling restrictions. Full compatibility with neutron annealing processes.

Any detector shape even irregular & tapered hexagons.

No dead zone. Doppler effect correction.

MSU SEGA detectors: 18

detectors each segmented in

32 folds

Tracking simulation on an AGATA

detector with 36 segments


SPI Integral space telescope: a 19 capsule array with coded mask.

Array of segmented Coaxial detectors

Arrangement of encapsulated HPGe crystals in a unique cryostat

For nuclear physics or other application requesting best efficiency (solid angle) and position information.

Dedicated shape and assembly for optimized detection efficiency.

From 2kg up to 12kg of HPGe material in one cryostat even with electrical cooling.

More than 270 capsules delivered world wide (EuroBall, MiniBall, Agata, Greta).

Up to 1100% relative efficiency possible on 7x 100% detectors with add-back measurement.

Compatible with harsh environment (space application).

Greta quartet detector: Four capsules each segmented in

36 = total of 148 channels per detector for best

tracking ability

4x

Gretina demonstrator phase with 5

detectors (inside view)

Artist view of the Greta

array with a total of 30

quartet detectors


Segmented Planar HPGe Detectors for imaging

Stopping power of HPGe or Si(Li) material For HPGe thicknesses up to 20mm. For Si(Li) thicknesses up to 10mm

Any segmentation pattern (strip, double sided strip, pixel, else?) down to a 50µm pitch.

Spatial resolution: down to 1mm.

Robust & stable thin window contacts - not sensitive to heat cycling.

Telescope arrangements in a unique custom designed cryostat

Industrial or rough motion applications compliant even for space application.

Cooled input stage, RT PA or dedicated ASICS with multiplexed readouts. Down to 1keV FWHM at 122keV.


Compton camera imaging principleMajor factors in Compton cameras:

Energy resolution FWHM Position resolution within the detector Doppler broadening

Compton camera made up from two detectors, scatter detector and absorber.

Energy of the incident gamma ray can be found by adding the energy deposited in both detectors.

The position of interaction within the detectors are used to fix the cone apex.

Opening angle of the cone is calculated using the Compton scattering formula.

The source lies somewhere on the surface of the cone. Several cones will determine the precise localization of the source.

The energy range of the compton camera telescope can be extended by using a third detector enabling scattering for lower energies.


Under development - High Z imaging sensor

What is it?: It acts as a camera taking images based on the number of particles which hit the

pixels when the electronic shutter is open. It aims color imaging and dead time free operation. It is based on a Medipix3read out, a CMOS pixel detector readout chip designed to be connected to a pixel sensor.

Development of HPGe pixel sensor for high Z applications with following features :

· Cooled operation (-60°C) needed to reduce leakage current (nA range per pixel)· Resolve thermal stress issues on interconnections for the readout· Fine pixel segmentation (55micron) and bump-bonding developments (outsourced)· Dedicated passivation.· Thin HPGe wafer (700μm).

Diodes produced by Proprietary Lithography Process. Collaboration with DESY Prof H. Graafsma’s group.


Questions


Documents

CANBERRA Nuclear Measurements Marijke KETERS Director Detector Product Management Hamburg DESY – 27th of March 2012