Gain suppression in LGAD detectors under focused and defocused femtosecond laser beam

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F10974938%3A_____%2F25%3A25_88_07" target="_blank" >RIV/10974938:_____/25:25_88_07 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.nima.2025.170844" target="_blank" >https://doi.org/10.1016/j.nima.2025.170844</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nima.2025.170844" target="_blank" >10.1016/j.nima.2025.170844</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gain suppression in LGAD detectors under focused and defocused femtosecond laser beam

Popis výsledku v původním jazyce

Low Gain Avalanche Diodes (LGADs) are particle detectors with a moderate gain (< 50) optimized for high energy physics experiments. Gain in these sensors is controlled by bias voltage but it depends also on the other factors such as temperature and charge density generated in the gain layer. When the laser pulses are used to study LGADs, charge density strongly depends on the beam parameters. The same laser intensity can induce different charge density across the gain layer if the focusing parameters vary. It is known that higher ionization densities cause reduction of the gain and this effect has been already investigated. Here, we present extension of the previous gain suppression studies investigating not only spatial, but also temporal distribution of the laser pulses. In addition, we demonstrate gain suppression effect at two different wavelengths commonly used in characterization of the silicon detectors.

Název v anglickém jazyce

Gain suppression in LGAD detectors under focused and defocused femtosecond laser beam

Popis výsledku anglicky

Low Gain Avalanche Diodes (LGADs) are particle detectors with a moderate gain (< 50) optimized for high energy physics experiments. Gain in these sensors is controlled by bias voltage but it depends also on the other factors such as temperature and charge density generated in the gain layer. When the laser pulses are used to study LGADs, charge density strongly depends on the beam parameters. The same laser intensity can induce different charge density across the gain layer if the focusing parameters vary. It is known that higher ionization densities cause reduction of the gain and this effect has been already investigated. Here, we present extension of the previous gain suppression studies investigating not only spatial, but also temporal distribution of the laser pulses. In addition, we demonstrate gain suppression effect at two different wavelengths commonly used in characterization of the silicon detectors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

ISSN

0168-9002

e-ISSN

1872-9576

Svazek periodika

1081

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

170844

Kód UT WoS článku

001541400100004

EID výsledku v databázi Scopus

2-s2.0-105011207905