Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure
Autor(a) principal: | |
---|---|
Data de Publicação: | 1998 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/4560 https://doi.org/10.1016/S0168-9002(98)00863-8 |
Resumo: | One of the main drawbacks of the use of microgap structures when used at high pressure (6 bar) at high count rates (~106 s-1 mm-2) is the limited maximum safe gain at which they can be operated. The use of a preamplification device such as the GEM (gas electron multiplier) can overcome this limitation; however, secondary space charge effects due to charge accumulation at the non-metallic surfaces cannot be neglected and should be minimised. These positive charges are due to the intrinsic multiplication of the GEM device and also to the drift of ions from the anode of the main detector. In this study we present data on the variation of the positive ion collection by the drift electrode versus drift field at several pressures up to 6 bar using a Kr-CO2 mixture. Data were collected with microgaps having several anode and insulator widths. The influence of the drift field in the pulse rise time is also considered. |
id |
RCAP_928eb28fb45a9a30633c506bc6da70fe |
---|---|
oai_identifier_str |
oai:estudogeral.uc.pt:10316/4560 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressureOne of the main drawbacks of the use of microgap structures when used at high pressure (6 bar) at high count rates (~106 s-1 mm-2) is the limited maximum safe gain at which they can be operated. The use of a preamplification device such as the GEM (gas electron multiplier) can overcome this limitation; however, secondary space charge effects due to charge accumulation at the non-metallic surfaces cannot be neglected and should be minimised. These positive charges are due to the intrinsic multiplication of the GEM device and also to the drift of ions from the anode of the main detector. In this study we present data on the variation of the positive ion collection by the drift electrode versus drift field at several pressures up to 6 bar using a Kr-CO2 mixture. Data were collected with microgaps having several anode and insulator widths. The influence of the drift field in the pulse rise time is also considered.http://www.sciencedirect.com/science/article/B6TJM-3VHW9D0-1H/1/7e6cb7ab07e3df379a279e38a943af611998info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4560http://hdl.handle.net/10316/4560https://doi.org/10.1016/S0168-9002(98)00863-8engNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 419:2-3 (1998) 460-463Fraga, F. A. F.Marques, R. FerreiraGonçalves, J. A. C.Gonçalo, J. R.Policarpo, A. J. P. LEijk, C. W. E. vanHollander, R. W.Berg, F. van deninfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-05-25T03:12:33Zoai:estudogeral.uc.pt:10316/4560Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:52.007819Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
title |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
spellingShingle |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure Fraga, F. A. F. |
title_short |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
title_full |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
title_fullStr |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
title_full_unstemmed |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
title_sort |
Effect of the drift field on avalanche gain and charge collection in microgap detectors at high pressure |
author |
Fraga, F. A. F. |
author_facet |
Fraga, F. A. F. Marques, R. Ferreira Gonçalves, J. A. C. Gonçalo, J. R. Policarpo, A. J. P. L Eijk, C. W. E. van Hollander, R. W. Berg, F. van den |
author_role |
author |
author2 |
Marques, R. Ferreira Gonçalves, J. A. C. Gonçalo, J. R. Policarpo, A. J. P. L Eijk, C. W. E. van Hollander, R. W. Berg, F. van den |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Fraga, F. A. F. Marques, R. Ferreira Gonçalves, J. A. C. Gonçalo, J. R. Policarpo, A. J. P. L Eijk, C. W. E. van Hollander, R. W. Berg, F. van den |
description |
One of the main drawbacks of the use of microgap structures when used at high pressure (6 bar) at high count rates (~106 s-1 mm-2) is the limited maximum safe gain at which they can be operated. The use of a preamplification device such as the GEM (gas electron multiplier) can overcome this limitation; however, secondary space charge effects due to charge accumulation at the non-metallic surfaces cannot be neglected and should be minimised. These positive charges are due to the intrinsic multiplication of the GEM device and also to the drift of ions from the anode of the main detector. In this study we present data on the variation of the positive ion collection by the drift electrode versus drift field at several pressures up to 6 bar using a Kr-CO2 mixture. Data were collected with microgaps having several anode and insulator widths. The influence of the drift field in the pulse rise time is also considered. |
publishDate |
1998 |
dc.date.none.fl_str_mv |
1998 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/4560 http://hdl.handle.net/10316/4560 https://doi.org/10.1016/S0168-9002(98)00863-8 |
url |
http://hdl.handle.net/10316/4560 https://doi.org/10.1016/S0168-9002(98)00863-8 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 419:2-3 (1998) 460-463 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799133888990150656 |