24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

Nanodiamond photocathode for MPGD-based single photon detectors at the future EIC

Not scheduled
Budker Institute of Nuclear Physics

Budker Institute of Nuclear Physics

11, akademika Lavrentieva prospect, Novosibirsk, Russia
Board: 40
Poster Micropattern gas detectors


Dr Triloki Pandit (Research Associate)


The construction of a Ring Imaging CHerenkov (RICH) detector for the particle identification in the high momenta range at the future Electron Ion Collider (EIC) is a challenging task. A compact collider setup imposes to construct a RICH with a short radiator length, hence limiting the number of photons. The last can be increased by detecting the photons in the far UV region. However, as standard fused-silica windows are opaque below 165 nm, a windowless RICH approach represents a possible choice. CsI is a widely used photo-cathode (PC) to detect photons in the far UV range, but because of its hygroscopic nature, it is very delicate to handle. Its Quantum Efficiency (QE) degrades in high intensity ion fluxes. These are the key reasons to quest for novel, less delicate PC with sensitivity in the far UV region. Layers of hydrogenated diamond nano grains have recently been proposed as alternative PC material and shown to have promising characteristics. The performance of nanodiamond PC coupled to THGEM-based detectors is the objects of our ongoing R&D. The first phase of these studies includes the characterization of THGEMs coated with nanodiamont PC, the comparison of the effective QE in vacuum and in gaseous atmospheres, the hardness respect to the PC bombardment by ions from the multiplication process. The approach is described in detail as well as all the results obtained so far with this exploratory studies.

Primary author

Dr Triloki Pandit (Research Associate)

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