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 detectors mounted on the Flexi-Board (EXOGAM) Folded-up Flexi-Board CsI(Tl) + light guide + PIN-PD Like a diamond

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

Particle Discrimination Concept Particle dependent rise time p CsI crystalPDCharge sensitive preamp Preamp signals for different particle types: NIM. A458(2001)759

Ballistic Deficit Method Energy signal should be rise time independent Particle signal should be rise time dependent Slow Filter Fast Filter Preamp Signal E (Energy signal) P (Particle signal)

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

Signal Shapes Time (a.u.) Filtered Signals (a.u.) Time (a.u.) Filtered Signals (a.u.) Response for fast detector signalResponse for slow detector signal EP EP ballistic deficit 10 μs 1.2 μs

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

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

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

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