pete jones university of jyväskylä intag workshop gsi, germany 24-25 may 2007 status of digital...
Post on 17-Dec-2015
213 Views
Preview:
TRANSCRIPT
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Status of digital electronics at JYFLStatus of digital electronics at JYFL
Pete Jones
Department of PhysicsUniversity of Jyväskylä, Finland
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Task 1 - Improvement of RDT method (Jyväskylä)
Extend the method from -decay tagging to - tagging, for the study of N~Z nuclei. Requires high granularity and small signal detection. General testing of the method will be carried out using the focal plane spectrometer (segmented Si – Ge array).
Subtask “Focal plane RDT detectors": Extension of GREAT and other focal plane spectrometers to include segmented planar Ge and large clover Ge (Daresbury, Liverpool); extension of the RDT method from a-decay tagging to - tagging (Daresbury, Jyväskylä, Liverpool); conceptual design of ASICs (Saclay).
Subtask “Prompt radiation spectrometers for RDT":
Digitisation of signals from detectors for prompt radiation (Daresbury, Jyväskylä, Liverpool); development of new prompt radiation spectrometers (Daresbury, Jyväskylä, Liverpool).
Subtask “RDT detector exploitation”:Marry extended GREAT to focal plane of RITU, in-beam testing; provide RITU expertise and accelerated beams (Jyväskylä).
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Digital Electronics Basics Why ? How ?
Aims for Instrumentation & Testing at JYFL
Results
Future Developments for Digital Electronics Instrumentation for Tagging
Contents
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Digital Electronics Basics
V. T. Jordanov and G. F. Knoll, “Digital synthesis of pulse shapes in real time for high resolution radiation spectroscopy ,” Nucl. Instr. and Meth. A345 (1994) 337-345
L. Arnold et al., “TNT Digital Pulse Processor”, IEE Trans. Nucl. Sci. 53 (2006) 723-728
Two Modes:1) Traces (Oscilloscope) - Digitisers2) Energy Mode (Trapezoids)
Traces sampled (fixed time)
Digital sampling, online calculationsGenerate CFD & Trapezoid for E calculation
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Why? Advantages…
Test Experiment with TNT Summer 2005
107,109Ag(36Ar,2p2n)139Eu 160 MeV β~2.5% Ib=5 – 50 pnA Ge count rate 10-100kHz RITU Gas counter 1-10kHz
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
How?TDR Triggerless Data Acquisition System Own 100MHz clock distributed for all TDR components SYNC pulses distributed RESYNC Pulse (T0) at 10ns precision
Information: Energies and timestamps for all detectors -> Germanium energies and times -> BGO timestamps for online Compton Suppression
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
How?TNT 4 channels per card – USB readout Master / Slave with Own 100MHz distributed
clock SYNC pulses from TDR RESYNC Pulse (T0) from TDR
Information: Energies and timestamps -> Veto logic inputs for internal veto marking
2 Shuttles for 6 TNT cards2 Event Collectors – Data conversion
Time Synchonisation, Merging1 System Merger for TNT & TDR
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Aims Run both TDR (Focal plane & JUROGAM) & TNT (JUROGAM) together Merge & timestamp to 10ns with 2 different clocks Keep synchronisation
Investigate different algorithms for Compton Suppression Compare analogue & digital produced datasets Solve some “mysterious” problems
P. Peura, Masters Thesis, JYFL (2007)
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Results I 202Hg(48Ca, 2n) 248Fm @ 211 MeV – Herzberg et al. TNT running in parallel Offline correlations with TDR Singles gamma or gamma-gamma Ge rates ~5 kHz
Syncronised data with TDR (Ge + BGO)Lower threshold ~17keV
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Results II 160Dy(48Ca,4-5n)203-4Rn
TNT running in parallel -> offline merge with TDR data
Strong recoil channel (1 hr) Recoil tagged gamma’s
Syncronised data with TDR (Ge + BGO)Lower threshold ~17keVImproved Linearity(INL ~ 0.001%)
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Results III 208Pb(48Ca,2n)254No
TNT running online in full mode with TDR data
Large cross-section Ge’s ~13kHz (beam limited) Recoil gates / tagged
Full spectroscopy system for TaggingExtra work needed for veto selection
R-D. Herzberg Nature, 442 (2006) 896-89
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Future & Digital Electronics…
Lyrtech developments (Daresbury, Liverpool) forSMARTPET & SAGE projects
Production of TDR cards & shapers cards in progressSynergies with other JRA’s for applications
Algorithm development and input to future designsInvestigate digitisation of signals for other detectorsApplication of digitisation for tagging methods
Pete JonesUniversity of Jyväskylä
INTAG WorkshopGSI, Germany
24-25 May 2007
Status of digital electronics at JYFLSummary
•Integration of TNT units with TDR completed & tested•Comparison of analogue & digital data progressing•Physics results – need for improvement
•Instrumentation for Tagging proved•Development for other detectors possible
•Future applications & projects look promising
top related