Lifetime testing UV LEDs for use in the LISA charge management system
File(s)
Accepted version
OA Location
Author(s)
Hollington, D
Baird, JT
Sumner, TJ
Wass, PJ
Type
Journal Article
Abstract
As a future charge management light source, UV light-emitting diodes (UV LEDs) offer far superior performance in a range of metrics compared to the mercury lamps used in the past. As part of a qualification program a number of short wavelength UV LEDs have been subjected to a series of lifetime tests for potential use on the laser interferometer space antenna (LISA) mission. These tests were performed at realistic output levels for both fast and continuous discharging in either a DC or pulsed mode of operation and included a DC fast discharge test spanning 50 days, a temperature dependent pulsed fast discharge test spanning 21 days and a pulsed continuous discharge test spanning 507 days. Two types of UV LED have demonstrated lifetimes equivalent to over 25 years of realistic mission usage with one type providing a baseline for LISA and the other offering a backup solution.
Date Issued
2017-10-19
Date Acceptance
2017-08-23
Citation
Classical and Quantum Gravity, 2017, 34 (20)
ISSN
0264-9381
Publisher
IOP Publishing
Journal / Book Title
Classical and Quantum Gravity
Volume
34
Issue
20
Copyright Statement
©2017 IOP Publishing Ltd.
Sponsor
European Space Agency / Estec
Grant Number
PFL-PSS/HB/bc/346/2011
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Multidisciplinary
Physics, Particles & Fields
Physics
LISA
UV LED
charge management
lifetime
discharging
LIGHT-EMITTING-DIODES
DEGRADATION
SAPPHIRE
MISSION
Publication Status
Published
Article Number
205009