pacs svr-ii 18 january 2007 fm ilt overview1 the pacs fm ilt phase i overview on actual test...

FM ILT overview 1

PACS SVR-II 18 January 2007

The PACS FM ILT Phase I

overview on actual test execution and analysis

Eckhard SturmMPE

FM ILT overview 2


• The PACS FM ILT started with warm short functional tests (SFT Warm) on October 12-18

• Cold tests were executed between October 31 and December 22, based on the test plan (B) that was introduced by U. Klaas in the previous presentation

• Phase I of the PACS FM ILT ended on January 4 with another SFT Warm

FM ILT overview 3


• Progress was very good! All planned tests were executed (sometimes ahead of schedule), except one test block (photometer set-ups III), which was replaced by further tests of the spectrometer (including red!)

• (Preliminary) analysis reports exist for most of the tests (see below and the following presentations, see also the SVR-II web page), but naturally some test data carry further information that still needs to be extracted.

FM ILT overview 4


• most of the mechanisms (grating, filter wheels, calibration sources, hetaers, flashers, OGSE mechanisms, xy-stage, etc.) are functional and perform as requested

• the bolometer and spectrometer detectors seem to be in spec (NEP)

• PSFs and spectral resolution seem to be in spec

• autonomous operations (long tests over night) were possible

• the Lens laser setup worked extremely well

• stable DECMEC (but QM)

• data analysis, mostly within PCSS, much more routine-like (and faster) than at CQM ILT

FM ILT overview 5


• the chopper is non-conformant

• the spectrometer slicer unit is non-conformant

• no DECMEC FM yet

FM ILT overview 6


• Original Plan was to warm up at the end of Phase I in order to replace the DECMEC QM with the DECMEC FM (see previous talk by U. Klaas)

• However, the chopper non-conformance required a full warm up and opening of the cryostat to inspect and possibly exchange the chopper

• The chopper performance was good enough to continue the planned tests of phase I without information loss

• In order to characterize the spectrometer as much as possible to detect potential major problems before opening the cryostat we decided to expand the spetrometer test program in phase I

• For tests of the red spectrometer we needed to connect the red Ge:Ga array to the blue DECMEC (switching cable connections at 40K).

FM ILT overview 7


The PACS ICC at work

FM ILT overview 8


FM ILT overview 9


Test block execution report status

SFT Warm complete - „SFT Warm Chopper and Internal Calibration Sources“

- “Functional and Performance Tests of Mechanisms“

Bolometer LTU tests complete - „Report on the FM ILT PhFPU functional tests“

SFT He I complete - „Report on the FM ILT PhFPU functional tests“

- „Functional and Performance Tests of Mechanisms“

- „SFT HeI Chopper and Internal CS on 31 October“

available / Name on SVR-II web page

OGSE characterisation Ia complete - „OGSE Characterisation during CQM/FM ILT“

Control Loop optimisation complete - „Functional and Performance Tests of Mechanisms“

- „Basic Drive Parameters Chopper.... “

- „Angular Calibration of Chopper (PCD 2.3.1)“

- pending: report on CS

FM ILT overview 10



SFT He II complete pending, but see briefing minutes (14 Nov)

Thermal behaviour complete (draft) - „Thermal

behaviour tests during FM-ILT...“

OGSE characterisation Ib complete - „Angular Calibration of Chopper (PCD 2.3.1)“

- „Further investigations of chopper angle....“


Photometer set-ups I (basic) complete - „Are the three modes....correctly interpreted?“

„all tests successful“

See presentations by H. Feuchtgruber and M. Sauvage

photometer & spectrometer

Lens Laser tests complete pending, but initial results on leaks, PSF, spectral resolution, wavelength calibration; see briefing minutes and presentation by H. Feuchtgruber

Plus spec AOT mode tests plus addtional tests

FM ILT overview 11



Photometer set-ups II a/b complete pending, but initial results on optimal bias and NEP; see presentations by M. Sauvage and A. Poglitsch

Spectrometer calibration I complete pending, but see presentation by plus RED ! H. Feuchtgruber

OGSE characterisation IIa complete pending, but optimal focus position was plus spectrom. determined and used in the further tests (see focus! briefing minutes (8 Dec) and presentation by M. Sauvage


(wavelength cal. vapour cell)

(optimal settings)

(photometer focus)

OGSE characterisation IIb partially pending, partially in - „Bolometer FOV Chopper Scans...“ (photometer)

FM ILT overview 12



Photometer set-ups III not done information partially in other tests

Spectrometer characteris. pending, but results are extracted; see presentations by H.

Feuchtgruber and A. Poglitsch

slicer NRB


(FOV scans, AOT mode tests, grating

scans in different resolutions, i.e.

SED, low, medium, high resolution,

line scans, point source rasters, slicer

NRB investigations)

(signal dependencies, pixel offsets,

low frequency noise, time constants...)

Additional tests with blue *AND* red spectrometer:

FM ILT overview 13


The Christmas Event

PACS Observations of Ursa Major and Ursa Minor on 22 December 2006

All data rights: A. Poglitsch

FM ILT overview 14


• OGSE characterisation I (basic function & performance) : complete

• OGSE characterisation II & III: partially, needs to be repeated (partially)

• photometer set-ups I and II (basic and optimal settings): complete

• spectrometer initial characterisation

• AOT like tests

• autonomous tests

Summary:

FM ILT overview 15


Mechanisms characterised (except chopper)

Photometer: optimal settings, and basic characterisations of PSF, spatial distortion, NEP, FOV, ...

Spectrometer: basic characterisation of PSF, instrumental (line) profiles, wavelength calibration, spectral resolution, relative spectral response, leakage and ghosts, FOV, NEP, ...

slicer non-conformance

chopper non-conformance

Full calibration yet to be done for both photometer and spectrometer

More details in the following presentations

pacs svr-ii 18 january 2007 fm ilt overview1 the pacs fm ilt phase i overview on actual test...

Documents