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Titolo:
Direct measurement of sub-pixel structure of the EPIC MOS CCD on-board theXMM/NEWTON satellite
Autore:
Hiraga, J; Tsunemi, H; Short, AD; Abbey, AF; Bennie, PJ; Turner, MJL;
Indirizzi:
Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043,Japan Osaka Univ Toyonaka Osaka Japan 5600043 ci, Toyonaka, Osaka 5600043,Japan Univ Leicester, Ctr Space Res, Leicester LE1 7RH, Leics, England Univ Leicester Leicester Leics England LE1 7RH er LE1 7RH, Leics, England
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
fascicolo: 2-3, volume: 465, anno: 2001,
pagine: 384 - 393
SICI:
0168-9002(20010611)465:2-3<384:DMOSSO>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE-COUPLED-DEVICE; SUBPIXEL STRUCTURE; XMM; EFFICIENCY; AXAF;
Keywords:
charge-coupled device; mesh experiment; open electrode structure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Hiraga, J Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, 1-1 Machikaneyama Cho, Toyonaka, Osaka 5600043, Japan Osaka Univ 1-1 Machikaneyama Cho Toyonaka Osaka Japan 5600043 an
Citazione:
J. Hiraga et al., "Direct measurement of sub-pixel structure of the EPIC MOS CCD on-board theXMM/NEWTON satellite", NUCL INST A, 465(2-3), 2001, pp. 384-393

Abstract

We have used a mesh experiment in order to measure the: sub-pixel structure of the EPIC MOS CCDs on-board the XMM/NEWTON satellite. The EPIC MOS CCDshave 40 mum-square pixels which have tin open electrode structure in orderto improve the detection efficiency for low-energy X-rays. We obtained restored pixel images for various X-ray event grades (e.g. split-pixel events,single pixel events, etc.) at various X-ray energies. We confirmed that the open electrode structure results in a distorted horizontal pixel boundary. The open electrode region generates both single pixel events and vertically split events, but no horizontally split events. Because the single pixelevents usually show the best energy resolution, we discuss a method of increasing the fraction of single pixel events from the open electrode region. Furthermore, we have directly measured the thickness of the electrodes anddead-layers by comparing spectra from the open electrode region with thosefrom the other regions: electrodes. electrode finger and channel stop. We can say that EPIC MOS CCDs are more radiation hard than front-illumination chips of ACIS on-board Chandra X-ray Observatory because of their extra absorption thickness above the charge transfer channel. We calculated the meanpixel response and found that our estimation has a good agreement with that of the ground calibration of EPIC MOS CCD. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 11:01:56