Study of Fast, Near-Infrared Photodetectors for the ITER Core LIDAR Thomson Scattering

Journal Article · Wed Mar 12 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2905057· OSTI ID:21136758

Giudicotti, L ^[1]; Pasqualotto, R; Alfier, A ^[1]; Beurskens, M; Kempenaars, M; Walsh, M J ^[2]

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1. Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, Corso Stati Uniti 4, 35127 Padova (Italy)
2. EURATOM/UKAEA Fusion Association, Culham Science Centre, 0X14 3DB, Abingdon (United Kingdom)

A key component for the ITER core LIDAR Thomson Scattering (TS) diagnostic would be a detector with good sensitivity in the 850-1060 nm near infrared (NIR) spectral region. Covering this spectral region becomes necessary if a Nd:YAG laser system operating at {lambda} = 1.06 {mu}m is used as the laser source, which is a very attractive choice in terms of available energy, repetition rate, reliability and cost. In this paper we review the state of the art of two types of detectors available for the above spectral range: the transferred electron (TE) InGaAs/InP hybrid photodiode and the In{sub x}Ga{sub 1-x}As microchannel plate (MCP) image intensifier and we describe the advancements necessary for a possible application in the ITER LIDAR TS. In addition we describe the preliminary characterization of new GaAsP fast MCP photomultipliers (PMTs) suitable for the detection of the visible part of the LIDAR TS spectrum in JET and ITER.

• OSTI ID: 21136758
• Journal Information: AIP Conference Proceedings, Vol. 988, Issue 1; Conference: International conference on burning plasma diagnostics, Varenna (Italy), 24-28 Sep 2007; Other Information: DOI: 10.1063/1.2905057; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON TRANSFER
GALLIUM ARSENIDES
IMAGE INTENSIFIERS
INDIUM ARSENIDES
INDIUM PHOSPHIDES
ITER TOKAMAK
JET TOKAMAK
MICROCHANNEL ELECTRON MULTIPLIERS
NEODYMIUM LASERS
OPTICAL RADAR
PHOTODETECTORS
PHOTOMULTIPLIERS
PLASMA DIAGNOSTICS
SENSITIVITY
THOMSON SCATTERING