19/04/23SPENVIS - Leuven, 1

The Energetic Particle Telescope (EPT)

M. Cyamukungu, Gh. Grégoire, S. Benck, J. Cabrera, L. Soung Yee, P. Leleux and J. Lemaire M. Cyamukungu, Gh. Grégoire, S. Benck, J. Cabrera, L. Soung Yee, P. Leleux and J. Lemaire (CSR)(CSR)

C. Lippens, D. Heynderickx, V. Pierrard and E. Van Ransbeeck (BISA)C. Lippens, D. Heynderickx, V. Pierrard and E. Van Ransbeeck (BISA)

E. Valtonen and J. Peltonen (ASRO)E. Valtonen and J. Peltonen (ASRO)

S. Duzellier, R. Ecoffet (ONERA/CNES)S. Duzellier, R. Ecoffet (ONERA/CNES)

Configurations for Characterizations of the Space Radiation EnvironmentConfigurations for Characterizations of the Space Radiation Environment

19/04/23SPENVIS - Leuven, 2

Contents:

1. Basic principle of the EPT

2. Particle channels & Detection efficiencies

3. The EPT configurations

4. The EPT Development status

5. The EPT and SPENVIS

6. Flight opportunity

7. The EPT development team

8. Conclusions

19/04/23SPENVIS - Leuven, 3

1. Basic principles of the EPT

19/04/23SPENVIS - Leuven, 4

Ele

ctr

on

s1

24

4

2. Detection efficiency (ctd)

19/04/23SPENVIS - Leuven, 5

Pro

ton

s

33

e48

25

29

48

2. Detection efficiency (ctd)

19/04/23SPENVIS - Leuven, 6

- p

art

icle

s

e72

e57

e72

49

53

49

2. Detection efficiency (ctd)

19/04/23SPENVIS - Leuven, 7

3.1. Low flux particle detector

3. The EPT configurations

19/04/23SPENVIS - Leuven, 8

3.1.1. Low flux particle detector: large F.O.V. angle for flux…

…measurements on board non-spinning satellites

19/04/23SPENVIS - Leuven, 9

3.1.2. Low flux particle detector: reduced F.O.V. angle for flux…

…measurement on board spinning satellites

19/04/23SPENVIS - Leuven, 10

3.2. High flux particle detector

3.2.1. High flux particle detector: variable aperture / F.O.V. angle

19/04/23SPENVIS - Leuven, 11

4. The EPT and SPENVIS

EPT configurationsEPT configurations

Already fulfilled requirements Not yet fulfilled requirements

SPENVISSPENVIS

Data analysis and modelling activities

Users requirements

19/04/23SPENVIS - Leuven, 12

5. The EPT development status

The (high flux) EPT prototype is being finalized and will be tested in november 2005.

This test will be followed by that of silicon sensors ( and half EPT) in january 2006.

19/04/23SPENVIS - Leuven, 13

6. Flight opportunity

The EPT schedule is drawn to fit into the development plan of the Environmental Explorer mission (NRL project)

The consortium is also interested in acquiring data on board Alphasat

19/04/23SPENVIS - Leuven, 14

7. The EPT development team

The EPT development was initiated in 1997 by Prof. Gh. Grégoire and Dr. M. Cyamukungu. The development of the DAM’s was supported by the Nuclear Physics Institute and the hardware for the prototype under construction was funded by the Belgian Institute for Space Aeronomy.

The construction of an Engineering Qualification Model is undertaken by an international team including skills from:

CSRCSR BelgiumBelgium

BISABISA BelgiumBelgium

Aboa Space Research OyAboa Space Research Oy FinlandFinland

ONERA/CNESONERA/CNES FranceFrance

With collaboration from NRL (USA) and Aerospace Corporation (USA)

19/04/23SPENVIS - Leuven, 15

The Energetic Particle Telescope (EPT) can be configured to measure particle fluxes in several radiation environment conditions.

Its main features are:

outstanding particle discrimination capability

high data acquisition rates due to digital operation mode

almost no background counting

extended energy range covered by a single instrument

digital reliability and built-in redundancy

Conclusions