NA61 Projectile Spectator Detector (PSD). Upgrade. Status. - - PowerPoint PPT Presentation

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Sep 05, 2022 227 likes •294 views

NA61 Projectile Spectator Detector (PSD). Upgrade. Status. Performance. Morozov Sergey Institute for Nuclear Research RAS, Moscow on behalf of NA61/Shine NA61 PSD. Motivation. Projectile Spectator Detector (PSD) gives a very important

SLIDE 1

NA61 Projectile Spectator Detector (PSD).

Upgrade. Status. Performance.

Morozov Sergey Institute for Nuclear Research RAS, Moscow

n behalf of NA61/Shine

SLIDE 2

NA61 PSD. Motivation. Projectile Spectator Detector (PSD) gives a very important informations:

centrality of nucleus-nucleus collisions
reaction plane orientation

N p=A− E s Ea

A – mass number of ion Ea – beam energy per nucleon Es – energy carried by the non-interacting nucleons (projectile spectators) -

measured by PSD!

Number of interacting participants:

PSD is a hadron sampling compensating calorimeter

Pb/scintillator (4/1) 60

sandwiches in one module

Modules 10 x 10 x 120 cm3 –

central part

Modules 20 x 20 x 120 cm3-
uter part
10 longitudinal sections with

10 MAPDs readout

ne PSD section view

Front face of PSD on a moving platform 44 modules, 440 MAPD channels, 17 tons.. PSD layout

2

MAPD

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NA61 PSD. Assembling and upgrade. full module assembled (+DAQ MB) PSD ready for upgrade FEE + temperature controller PSD fully equipped 3

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4

PSD readout PC HVSys HVSys HVSys

. . .

HVSys flat cable

TEC TEC TEC TEC

RS485 network (twisted pair) HV control box USB to RS485 Converter

LAN USB Schematic view of slow control and temperature control readout system for NA61 PSD HVSys, Dubna

USB to RS485 Converter

NA61 PSD. Design. Upgrade. TEC-1091

ambient temperature PSD module temperature

SLIDE 5

ADC

this is “1 MIP”

NA61 PSD. Calibration. NA61 PSD was calibrated during 27 October – 3 November on SPS beam:

muon + hadron beam centred on each of 44 modules for precise muon calibration

and hadron energy reconstruction tests

beam momentum scan (13, 20, 31, 40, 60, 80, 120 and 158 GeV/c) for fine tuning
f PSD response and check linearity and hadronic energy resolution
44 module scan with reduced HV on MAPD to increase the dynamic range of MAPD

for using PSD at high nucleus-nucleus collisions perfect MIP-like signal visible! 5

SLIDE 6

20GeV 31GeV 40GeV 60GeV 80GeV 120GeV 158GeV

NA61 PSD. Calibration. Performance Results of PSD calibration:

good linearity of response observed
hadron energy resolution was estimated