Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lifetime Testing UV LEDs for Use in the LISA Charge Management System   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 and provide a baseline and backup solution for LISA.

12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
2
The categories of this paper are: math
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg