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Status of digital electronics at JYFL

Status of digital electronics at JYFL. Pete Jones. Department of Physics University of Jyväskylä, Finland. Contents. Digital Electronics Basics Why ? How ? Aims for Instrumentation & Testing at JYFL Results Future Developments for Digital Electronics Instrumentation for Tagging.

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Status of digital electronics at JYFL

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  1. Status of digital electronics at JYFL Pete Jones Department of PhysicsUniversity of Jyväskylä, Finland INTAG Workshop GSI, Germany

  2. INTAG Workshop GSI, Germany

  3. Contents • Digital Electronics Basics • Why ? • How ? • Aims for Instrumentation & Testing at JYFL • Results • Future Developments for Digital Electronics • Instrumentation for Tagging INTAG Workshop GSI, Germany

  4. Digital Electronics Basics • Two Modes: • Traces (Oscilloscope) - Digitisers • Energy Mode (Trapezoids) Digital sampling, online calculations Generate CFD & Trapezoid for E calculation Traces sampled (fixed time) 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 INTAG Workshop GSI, Germany

  5. 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 INTAG Workshop GSI, Germany

  6. 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 INTAG Workshop GSI, Germany

  7. 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 cards 2 Event Collectors – Data conversion Time Synchonisation, Merging 1 System Merger for TNT & TDR INTAG Workshop GSI, Germany

  8. 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) INTAG Workshop GSI, Germany

  9. 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 INTAG Workshop GSI, Germany

  10. Results II Syncronised data with TDR (Ge + BGO) Lower threshold ~17keV Improved Linearity (INL ~ 0.001%) • 160Dy(48Ca,4-5n)203-4Rn • TNT running in parallel -> offline merge with TDR data • Strong recoil channel (1 hr) • Recoil tagged gamma’s INTAG Workshop GSI, Germany

  11. 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 Tagging Extra work needed for veto selection R-D. Herzberg Nature, 442 (2006) 896-89 INTAG Workshop GSI, Germany

  12. Future & Digital Electronics… Lyrtech developments (Daresbury, Liverpool) for SMARTPET & SAGE projects Production of TDR cards & shapers cards in progress Synergies with other JRA’s for applications Algorithm development and input to future designs Investigate digitisation of signals for other detectors Application of digitisation for tagging methods INTAG Workshop GSI, Germany

  13. 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 INTAG Workshop GSI, Germany

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