AGATA detector characterization: scanning setup at Orsay

Concept of the Orsay scanning system (last Agata week – K. Hauschild)

Status and plans

A. Lopez-Martens & A Korichi for the Orsay (IPN-CSNSM) Group

LN2

XYZ table

Ge segment andanode signals / NaI

500 MBq

Digital [TNT]/Analogueelectronics

Industrial PC

ScanningScanning

PC Linux [NARVAL]+ SDLT + 1.3 TB NAS

NaI

Linux

Experimental hall at the CSNSMExperimental hall at the CSNSMExperimental hall at the CSNSMExperimental hall at the CSNSM

EM shielded and air conditionned Area & EMC control

Concept : xyz Table + TOHR (Orsay)

Digitalelectronics

Focal point

2r

F e

dd’

Positionning rods

Tungten sheet

Brace

•40 triangular–shaped 200m thick W-plates •Plate separation : 200 m•200 m diameter holes on a hexagonal lattice

Agata detector : movmentXy movmentTohr : z movment Coincidences : 6 NaI detectors

Intense Source : 15 mCi

Volume /scan point : 2 x 2 x 2-3 mm3 : 3D Scan of the whole detector

From simulations, the number of single interaction Compton scatter events at a given position : 400/h @front face and 10/h @the back of the detector

TOHR NaI Gamma-beam

AGATA Ge

Compton scatter

Collimated 137Cs delivered : 477 MBq -> 2 kHz

After a heavy safety procedure (A. Lopez-Martens) we are allowed to use the source

Security trolleySecurity lock down

More security

G4 simulations have shown that TOHR collimator are too thin (K. Hauschild)

Double up the thikness

Recalibration of each TOHR module (focal point) Done (J. Robin & F. Le Blanc)

Mechanics ready (P. Pariset)A conventional XY table, the motorised rotational plate to turn the AGATA detector and the stepping motor for the z-translation of TOHR : delivered Programming Software for the different movements : done (E. Legay, N. Dosme and X. Grave)

VME interface ACQ-CAMC

__________________

CAMAC Analogique

___________________

TNT2 + trigger___________________

HT et BT détecteur___________________

ATCA AGATA

The analog electronics: 3x(16 channels) CADC cards developped and tested VME interface ACQ- CAMAC : under way(D. Linget, E. Legay, S. Leboutelier, X. Grave)

Electronics housing :Spécial temperature

Controlled rack

AP1 Infrastructure : ready

Analogue electronics (48ch) and DAQ (Narval) ready

Digital electronics : 10 TNT2 cards (Gabriela) are under tests at Strasbourg

Commmissioning of the set-up with a real Agata detectorPossible from April 2006

Orsay set-up : Ready to scan summer 2006

Summary

VME interface ACQ-CAMC

__________________

CAMAC Analogique

___________________

TNT2 + trigger___________________

HT et BT détecteur___________________

ATCA AGATA (plus tard)

PC-Linux ACQ

__________________PC table xy,

Commande moteur__________________

LN2-Auto_

Status : future prospects

Manque ACQ et électronique analogique

TNT2 cards under tests at iresReady in few weeks

Commmissioning of the set-up with a real agata detectorApril 2006 Ready to scan summer 2006

Liste des gens

Collimated 137Cs source

‘security’ trolley

‘security’ lock down

more ‘security’