HADES RICH upgrade and CBM RICH H12700 MAPMTs concept HADES test - PowerPoint PPT Presentation

DIRC 2017 V. Patel Overview HADES RICH upgrade and CBM RICH H12700 MAPMTs concept HADES test box COSY beam test Vivek Patel for HADES and CBM Collaborations Bergische Universitat Wuppertal DIRC2017: Workshop on fast Cherenkov detectors

Overview: HADES in Nutshell DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test High Acceptance Di-electron Spectrometer(HADES) at GSI(SIS 18)

Overview: Past, Present & Future DIRC 2017 V. Patel Overview HADES RICH is in operation since 2000. H12700 MAPMTs Upto now: Reflective CsI photocathode and MWPC HADES test readout for photon detection, RICH is hadron blind with box C 4 F 10 gas radiator . COSY beam test Photon detector is being upgraded with H12700 MAPMTs from Hamamatsu. A new readout electronics is developed in a joint effort of HADES,CBM & PANDA collaboration, based on TRB project.

Overview : Mechanical Upgrade DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test Schematic diagram of HADES RICH upgrade

Overview : Simulation DIRC 2017 V. Patel Monte Carlo simulations of Overview the upgraded HADES RICH H12700 detector. MAPMTs Blue dots: photons hitting HADES test box the PM. Red points: COSY beam registered photons. test 7 to 15 detected photons per Cherenkov ring. Short radiation length: l ∼ 35-70cm depending on e ± polar emissions.

H12700 MAMPT: Common photon detector for HADES & CBM RICH DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test H12700 is 64 Channel box MAPMT developed by COSY beam Hamamatsu, Japan. test It is a modified version of the H8500 MAPMT for detecting single photons.

QA tests for H12700 MAPMTS DIRC 2017 V. Patel Overview H12700 Detailed quality control of each and every MAPMT is MAPMTs important for both HADES and CBM RICH. HADES test box There are various criteria set for these MAPMTs to be COSY beam test suitable for their use in HADES & CBM. Important criteria are : Dark rates,Quantum efficiency, gain in channels etc. Dedicated test bench for Quality Assesment.

QA tests for H12700 MAPMTs DIRC 2017 V. Patel Test bench is a light tight box. Overview At a given time one can test 3 H12700 MAPMTs MAPMT with respect to one HADES test reference MAPMT. box Triggered light-source emitting COSY beam test ”single” photons ( ∼ 1 γ/ 10 pulses) Light fiber guides photons to specific XY point on MAPMT. Optical fiber + focussing optic ( ∼ 0.5 mm) Self-triggered readout-scheme based on n-XYTER-ASIC

QC tests for H12700 MAPMTs DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test

Temperature dependence on dark rate DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test Time evolution of dark rate as a function of temperature

Readout Electronics for RICH MAPMTs DIRC 2017 Prototype of all readout modules are succesfully V. Patel tested ..!! Overview H12700 MAPMTs HADES test box COSY beam test

Experimental setup: HADES photon detector DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test HADES test box in HADES cave,GSI

Experimental setup: HADES photon detector DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test Analog part of DiRICH has been tested in HADES testbox. Single module with two active probes(i/p impedence 0.8pF) connected to two channels at the output of preamp. The signals from preamp thus can be visualized using an oscilloscope(4GHz-R&S oscilloscope).

MAPMT signal on Oscilloscope DIRC 2017 V. Patel MAPMT signal Overview After preamplification H12700 MAPMTs Directly before HADES test box dicrimination+TDC inside COSY beam FPGA. test Picosecond pulse laser(600nm) inside the test setup to generate single photons. Courtesy: PANDA group

Time over threshold studies ToT(Pulse width)(blue:no ToT cut red:ToT > 2ns) DIRC 2017 V. Patel 600 Overview Threshold 30mV Threshold 60mV 2500 500 H12700 2000 MAPMTs 400 1500 HADES test 300 box 1000 200 COSY beam 500 100 test × − 9 × − 9 10 10 0 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 Pulse width(s) Pulse width(s) 600 500 Threshold 90mV Threshold 150mV 500 400 400 300 300 200 200 100 100 − − × 9 × 9 10 10 0 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 Pulse width(s) Pulse width(s)

Leading edge timing DIRC 2017 Leading edge timing(blue:no ToT cut red:ToT > 2ns) Timing: Trig-Channel Channel1-Channel2 V. Patel Overview Threshold 30mV Threshold 30mV 450 H12700 500 400 MAPMTs 350 400 300 HADES test 250 300 box 200 200 COSY beam 150 test 100 100 50 − − × 9 × 9 10 10 0 0 − − − − − − − − − − 10 8 6 4 2 0 2 4 6 8 10 10 8 6 4 2 0 2 4 6 8 10 Trig-Channel timing(s) Channel-Channel timing(s) RMS=450ps RMS=560ps Gauss fit=350 Gauss fit=450

Large system test in HADES test box DIRC 2017 V. Patel For full system tests we Overview H12700 have installed two modules MAPMTs of 3x2 in HADES test box. HADES test box It consists of 12 COSY beam MAMPMTs and 24 test DiRICH modules. A laser(600nm) act as source of single photons. Data from all the DiRICH is studied using GO4.

Large system test in HADES test box DIRC 2017 A mask was used to cover V. Patel the PMT plane.It was Overview created such that roughly H12700 MAPMTs one pixel is exposed to the HADES test laser. box COSY beam Whole system can be test operated remotely including high voltage supply. The data collected from all the DiRICH can be studied both individually and collectively using ROOT and GO4.

Some intitial results: Differentiated Rate Spectrum DIRC 2017 V. Patel Threshold scan Overview 50000 rate [Hz] Legende H12700 45000 rate Channel 2: width 17.7 mV MAPMTs rate Channel 3: width 20.6 mV 40000 HADES test d/dthr ch 2 box 35000 d/dthr ch 3 COSY beam 30000 test Threshold: 60 mV 25000 20000 15000 10000 5000 28000 30000 32000 34000 36000 38000 40000 Threshold [DAC]

Some initial results: ADC Spectra DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test

Some initial results: Single Photon Events 2d hitmap Hit Multiplicity per event DIRC 2017 3 × 10 16 50000 140 14 V. Patel 40000 120 12 100 10 30000 80 Overview 8 20000 60 6 H12700 40 4 10000 MAPMTs 20 2 0 0 2 4 6 8 10 12 14 16 18 20 22 24 0 2 4 6 8 10 12 14 16 18 HADES test Xpos(Pixel) detected hits/trigger box Single Event Nr 40 Single Event Nr 41 16 16 COSY beam 14 14 test 12 12 10 10 8 8 6 6 4 4 2 2 2 4 6 8 10 12 14 16 18 20 22 24 2 4 6 8 10 12 14 16 18 20 22 24 Xpos(Pixel) Xpos(Pixel) Single Event Nr 42 Single Event Nr 43 16 16 14 14 12 12 10 10 8 8 6 6 4 4 2 2 2 4 6 8 10 12 14 16 18 20 22 24 2 4 6 8 10 12 14 16 18 20 22 24 Xpos(Pixel) Xpos(Pixel)

A little creativity... DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test

Power Management of HADES RICH DIRC 2017 30 W per 3x2 PMT V. Patel module (12x Dirich, 1x Overview Combiner, 1x Power H12700 MAPMTs (DCDC)) HADES: 74 HADES test modules − > up to 2.2 box kW. COSY beam test Mask of plastic with integrated air tubing Central socket for the Air supply, compressed air generator Escape holes for each module Serves double purpose: (i)Light shield on top of backplane (ii)Distribution of cooling air

Setup for COSY RICH testbox DIRC 2017 V. Patel Cosy RICH test box for beam Overview test in November 2017 H12700 At the moment used for lab MAPMTs tests HADES test ����� box ����������� Fully equipped two 3x2 COSY beam modules(12 MAPMTs) test ��������� A reflective glass radiator of ������� ����������� ��������� �������������� thickness 2.4cm at center. Focal length-30cm, Ref-ind - 1.51(for visible light) Coating Material - Aluminium with layer of MgF 2

CBM RICH overview DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test

Tests of DiRICH with MCP DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test MCPs and MAPMTs have slightly different pinning and connector positions (and size). Adapter allows to put MCPs on “standard” 3x2 backplane for first tests. Adapter includes passive Voltage Divider. HV supply via backplane possible(“tested” up to 1900V).

Test of DiRICH with MCP DIRC 2017 V. Patel Overview H12700 MAPMTs HADES test box COSY beam test Persistance plot of MCP signal on Oscilloscope