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Titolo:
X-ray measurement of the subpixel structure of the XMM EPIC MOS CCD
Autore:
Tsunemi, H; Yoshita, K; Short, AD; Bennie, PJ; Turner, MJL; Abbey, AF;
Indirizzi:
Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Osaka 5600043, Japan Osaka Univ Osaka Japan 5600043 t Earth & Space Sci, Osaka 5600043, Japan Univ Leicester, Dept Phys & Astron, Xray Astron Grp, 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: 437, anno: 1999,
pagine: 359 - 366
SICI:
0168-9002(19991121)437:2-3<359:XMOTSS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE-COUPLED-DEVICE; EFFICIENCY; PIXEL;
Keywords:
charge-coupled device; mesh experiment; open electrode; subpixel resolution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Tsunemi, H Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, 1-1 Machikaneyama Cho, Osaka 5600043, Japan Osaka Univ 1-1 Machikaneyama Cho Osaka Japan 5600043 43, Japan
Citazione:
H. Tsunemi et al., "X-ray measurement of the subpixel structure of the XMM EPIC MOS CCD", NUCL INST A, 437(2-3), 1999, pp. 359-366

Abstract

We report here the results of a mesh experiment to measure the subpixel structure of the EPIC MOS CCDs on board the XMM X-pay observatory. The pixel size is 40 mu m square while the mesh hole spacing is 48 mu m, a combination quite different from our standard mesh experiment. We have verified that this combination functions properly and have analyzed the CCD structure with sub-pixel resolution. The EPIC MOS CCD has an open electrode structure toimprove detection efficiency at low energies. We obtained the distributionof various grades of X-ray events inside the pixel. A horizontally split two-pixel event is generated near the channel stop which forms a straight vertical pixel boundary whereas a vertically split two-pixel event is generated where the potential due to the thinned gate structure forms a wavy horizontal pixel boundary. Therefore, the effective pixel shape is not a square but is distorted. The distribution of X-ray events clearly shows that the two etched regions in each pixel, separated by the bridging finger of the enlarged (open) electrode. We measured the difference in X-ray transmission between the conventional and open regions of the pixel using O-K and Cu-L X-ray emission lines, and found it to be consistent with an electrode thickness comprising 0.2 +/- 0.1 mu m of Si and 0.6 +/- 0.2 mu m of SiO2. (C) 1999Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 05:50:27