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DIAMANT Electronics Upgrade at ATOMKI

DIAMANT Electronics Upgrade at ATOMKI. Ferenc Nagy ATOMKI, HUNGARY. The DIAMANT. Light charged particle detector Particle discrimination Nearly 4  solid angle 80 channels (analog). The DIAMANT. CsI(Tl) + light guide + PIN -PD. CsI detectors mounted on the Flexi-Board (EXOGAM).

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DIAMANT Electronics Upgrade at ATOMKI

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  1. DIAMANT Electronics Upgrade at ATOMKI Ferenc Nagy ATOMKI, HUNGARY

  2. The DIAMANT • Light charged particle detector • Particle discrimination • Nearly 4 solid angle • 80 channels (analog)

  3. The DIAMANT CsI(Tl) + light guide + PIN-PD CsI detectors mounted on the Flexi-Board (EXOGAM) “Like a diamond” Folded-up Flexi-Board

  4. DIAMANT Upgrade • Mechanical • Analog Front-end PIN-PD => APD (better S/N) • Digital Signal Processing (digital implementation of former electronics)

  5. NIM. A458(2001)759 Particle Discrimination Concept Preamp signals for different particle types: Particle dependent rise time   p  CsI crystal PD Charge sensitive preamp

  6. Slow Filter E(Energy signal) Preamp Signal Fast Filter P (Particle signal) Ballistic Deficit Method • Energysignalshould be rise time independent • Particlesignalshould be rise time dependent

  7. S R Timestamp P Status E Event (128 bits) Proposed DIAMANT DSP (1 Ch.) Slow Shaping DLS (10 μs) MA (5 μs) PD E 50 MHz Preamp Signal ADC Event P DLS (1.2 μs) MA (0.6 μs) PD Fast Shaping Peak detector enable TD DLS: Delay Line Shaper MA: Moving Averager PD: Peak Detector TD: Threshold Detector Threshold

  8. Filtered Signals (a.u.) Time (a.u.) Signal Shapes 10 μs 1.2 μs ballisticdeficit P E P E Filtered Signals (a.u.) Time (a.u.) Response for fast detector signal Response for slow detector signal

  9.  Rays (CsI) Protons  particles  Rays (PIN-diode) Particle-Energy Diagram Normalization An example: Particle ID = C – P / E

  10. Timestamp P Status E Event (128 bits) Feasibility Test of the DSP • ATOMKI DSP CARD • 1 channel tested • CsI(Tl) + PIN-PD • CsI(Tl) + APD • 128-bit events • list mode DAQ DAQ PC (event list) 1G Ethernet Ch1 ATOMKI DSP Card Ch2 Ch3 Charge sensitive preamp Ch4 CsI(Tl) PIN-PD/APD

  11. ATOMKI DSP Card Front-end 4 Ch ADC Virtex4 Ethernet PHY MAC Gigabit Ethernet Network Analog Inputs DSP Event

  12. Experimental Result Thank you for your attention! alphas gammas protons Energy Particle ID

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