D. Dąbrowski, M. Peryt, K. Rosłon

Gas system for MPD Time-of-Flight detector

3-7 November 2015 NICA DaysD. Dąbrowski

Tracking: TPC, IT, ECT

T0, Triggering: FFD

Centrality, Event plane: ZDC

Particle ID: TOF, ECAL, TPCFFD

MultiPurpose Detector (MPD)

3-7 November 2015 NICA DaysD. Dąbrowski

Time-Of-Flight (TOF) detector

MPD TOF TDR 2015

MPD TOF TDR 2015

MPD TOF TDR 2015

3-7 November 2015 NICA DaysD. Dąbrowski

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Particle IDentification (PID):

How does it work ?

MPD TOF TDR 2015

0.5<p<1 GeV/c

3-7 November 2015 NICA DaysD. Dąbrowski

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Gas mixture requirements:

- Low threshold of avalanches

- Fast (high electrons drift velocity)

- No secondary effects, like photon feedback

- Cheap, Eco-friendly, safe, not ageing 3-7 November 2015 NICA Days

D. Dąbrowski

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Gas Mixture

90% C2H2F4 + 5% i-C4H10 + 5% SF6

3-7 November 2015 NICA DaysD. Dąbrowski

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Purity

O2 content: < 1000 ppm

H2O content: < 100 ppm

Two effects: - modification of transport parameters- electron loss by capture due to

electro-negative pollutants

3-7 November 2015 NICA DaysD. Dąbrowski

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Gas system

3-7 November 2015 NICA DaysD. Dąbrowski

3-7 November 2015 NICA DaysD. Dąbrowski

Gas supply system

Mixer

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Purification

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Control system

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Thank you for your attention !