With the life of ESA's Infrared Space Observatory nearing its end, we propose
to bring together infrared detector experts from within ISO's community,
from other IR space projects (IRAS, COBE,IRTS, MSX, WIRE, SIRTF, IRIS, FIRST)
and experts from relevant fields in solid state physics, to review the
current status of ISO's detectors and the prospects of eliminating unwanted
effects.
The meeting will be held at the ISO ground station in the ESA center Vilspa,
near Madrid, on 14, 15 and 16 january 1998.
The prime objectives of this workshop are:
To construct a detailed overview of the behaviour and performance of ISO's
detectors
To investigate if extra detector characterisation measurements
with ISO are needed, before the end of the mission,
To review methods and algorithms on detector glitch detection and
removal,
To present and discuss methods for empirical and theoretical modelling of
detector transients in order to improve the photometric calibration quality.
In addition the ISO experience could be very valuable for future IR
missions.
With the many different detector types and read-out technologies used
in the four ISO instruments a large variety of effects of the space
environment have been observed. Although complicating the overall picture,
this variety may give us the broad and complementary information needed
to understand the observed phenomenae.
The performance and behaviour of the detectors have been different
than anticipated from laboratory tests, and the measured particle
environment deviated from the predictions. It is therefore also the
intention to have experts in this field attend as well.
The following tentative agenda is proposed:
Introduction
Introduction of the ISO instruments with emphasis on the detector and
readout technology used
Presenting overviews by the four ISO instrument teams, of the following
phenomenae, from the pre-launch and in-orbit measurements with the trends
(revolution number and within a revolution)
- Dark currents
- Dark noise and noise characteristics (stability, baselines etc.)
- Responsivity
- Bias and temperature dependence
- Linearity and saturation
- Read-out noise and amplifier chain characteristics
- Glitch effects (frequency, amplitude, tails, secondaries?, etc.)
- Transient behaviour (signal strength dependence)
- Curing methods and shielding effects
- Selected observing strategies, role of on-board stimuli,
- The ultimate sensitivity (to be) achieved
Presentation of the ISO radiation environment
- Predicted dose and its characteristics, space weather etc..
- observed particle environment
Spike and noise correlation between the ISO instruments
Experience from other missions: IRAS, COBE, MSX, IRTS
Predictions for the particle environment, and behaviour and performance
of detectors of future missions (including results from designs for
radiation hardening and ground irradiation experiments):
WIRE, SIRTF, IRIS, FIRST, NGST, DARWIN....
Glitch detection and removal:
- Approach, algorithms, results
Transient effects:
- Solid state physics background and theoretical models
- Empirical Models: approach, algorithms and results
Workshop Summary and Recommendations
The proposed format for the meeting is to have one and a half day of
presentations, a day of splinter meetings followed by presentations of
the summaries,conclusions and recommendations.
It is the intention to have copies of all vugraphs distributed to the
workshop participants within a week after the workshop. The proceedings of
the workshop will be published in a special issue of Experimental Astronomy,
a refereed journal.
The Scientific Organising Committee consists of:
C. Cesarsky (CEA, Saclay), P.E.Clegg (QMW, London), Th. de Graauw (SRON,
Groningen) Co-chair, M. Kessler (ESA, Vilspa) Co-chair,
D.Lemke (MPIA,Heidelberg) and E. Young (U-Arizona, Tucson)
For attendance and abstracts: send an e-mail to the chairmen to
isodetec@iso.vilspa.esa.es ; before november 15, 1997!!
We recommend to make your own hotel reservation in hotel Florida Norte
from where we will have a bus leave to Vilspa during the workshop days.
Info
Florida Norte:
P. de la Florida 5,
28008 Madrid
Tel. 34 1 542 8300; fax 34 1 547 7833
For assistance, if needed, call Mrs A. Willis at Vilspa tel 34 1 8131 254
