Thermal characterization of high strip current microchannel plate photomultipliers

Andrea Sardella; Michele Bassan; Leonardo Giudicotti; Luca Lotto; Roberto Pasqualotto

doi:10.1117/12.218638

8 September 1995 Thermal characterization of high strip current microchannel plate photomultipliers

Andrea Sardella, Michele Bassan, Leonardo Giudicotti, Luca Lotto, Roberto Pasqualotto

Proceedings Volume 2551, Photoelectronic Detectors, Cameras, and Systems; (1995) https://doi.org/10.1117/12.218638
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

We have investigated the thermal behavior of a set of 40 mm, high strip current, microchannel plate (MCP) photomultipliers developed for a diagnostic system of a fusion plasma by laser scattering. These detectors include a V-stack of very low resistivity (5 X 10⁶ (Omega) m) microchannel plates and must be operated with a pulsed high voltage power supply under strict control of the temperature. Therefore the resistance of the V-stacks has been studied as a function of the MCP temperature and of the applied voltage by applying short pulses of high voltage to the detectors in a temperature comtrolled environment. At low applied voltage (approximately 1 V) a resistance of 2.05 X 10⁶ (Omega) was measured for one of the V-stacks, with a resistance coefficient of -1.47 X 10⁴ (Omega) /degrees C. At high voltage the resistance was found to be lower by about a factor three and showed a linear decrease with both the MCP temperature and the applied high voltage. From these measurements the detector thermal capacitance and thermal conductivity were found to be 0.79 J/degrees C and 1.85 X W/degrees C respectively. The measured parameters are used in a simplified thermal model of the detectors for the construction of the pulsed power supply control system necessary to operate them in safe conditions.

Citation Download Citation

Andrea Sardella, Michele Bassan, Leonardo Giudicotti, Luca Lotto, and Roberto Pasqualotto "Thermal characterization of high strip current microchannel plate photomultipliers", Proc. SPIE 2551, Photoelectronic Detectors, Cameras, and Systems, (8 September 1995); https://doi.org/10.1117/12.218638

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available