eprintid: 10120423
rev_number: 30
eprint_status: archive
userid: 608
dir: disk0/10/12/04/23
datestamp: 2021-04-23 15:58:43
lastmod: 2021-11-16 00:12:42
status_changed: 2021-04-23 15:58:43
type: article
metadata_visibility: show
creators_name: Bedington, R
creators_name: Kataria, D
creators_name: Walton, D
title: Using a CCD for the direct detection of electrons in a low energy space plasma spectrometer
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F63
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: An E2V CCD64 back-illuminated, ion-implanted CCD (charge-coupled device) has been used as a direct electron imaging detector with CATS (Conceptual And Tiny Spectrometer), a highly miniaturised prototype plasma analyser head. This is in place of an MCP (microchannel plate) with a position sensing anode which would more conventionally be used as a detector in traditional low energy space plasma analyser instruments. The small size of CATS however makes it well matched to the size of the CCD, and the ion implants reduce the depth of the CCD backside electron potential well making it more sensitive to lower energy electrons than standard untreated silicon.

Despite ionisation damage from prolonged exposure to excessively energetic electrons, the CCD has been able to detect electrons with energies above 500eV, at temperatures around room temperature. Using both a long integration 'current measuring' mode and a short integration `electron counting' mode it has been used to image the low energy electrons exiting the analyser, enhancing our understanding of the CATS electrostatic optics.

The CCD has been selected as the detector for use with CATS for an instrument on a low-altitude student sounding rocket flight. Although it cannot detect the lowest energy electrons that an MCP can detect, and it is more sensitive to stray light, the low voltages required, the lack of vacuum requirements and its novelty and availability made it the most attractive candidate detector.
date: 2012-01
date_type: published
publisher: IOP PUBLISHING LTD
official_url: https://doi.org/10.1088/1748-0221/7/01/C01079
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 387822
doi: 10.1088/1748-0221/7/01/C01079
lyricists_name: Bedington, Robert
lyricists_name: Kataria, Dhiren
lyricists_name: Walton, David
lyricists_id: RBEDI54
lyricists_id: DKATA58
lyricists_id: DMWAL20
actors_name: Allington-Smith, Dominic
actors_id: DAALL44
actors_role: owner
full_text_status: public
publication: Journal of Instrumentation
volume: 7
article_number: C01079
pages: 15
citation:        Bedington, R;    Kataria, D;    Walton, D;      (2012)    Using a CCD for the direct detection of electrons in a low energy space plasma spectrometer.                   Journal of Instrumentation , 7     , Article C01079.  10.1088/1748-0221/7/01/C01079 <https://doi.org/10.1088/1748-0221%2F7%2F01%2FC01079>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10120423/7/Kataria_Using_a_CCD_for_the_direct_detection_of_electrons_extracted.pdf