PACS IIDR ESTEC 01/02 March 2001 OGSE 1 PACS Instrument Intermediate Design Review (IIDR) Reinhard Katterloher OGSE

OGSE 1

PACS IIDR ESTEC 01/02 March 2001

PACS Instrument Intermediate Design Review (IIDR)

Reinhard Katterloher

OGSE

OGSE 2


Optical Ground Support Equipment (OGSE)

• PACS OGSE consists of different cryostats, several cryogenic beam conditioning optics and infrared sources (i.e. OGSE –0, -1, -2, -3, -4)

• OGSE 0 for FPU alignment/verification is under design and will be provided by KT/MPE

• OGSE 1, 2 and 4 are required for detector module testing (will be provided by MPE, MPIA and LENS)

• OGSE 3 and 4 are required for instrument performance verification and on-ground wavelength calibration (will be provided by MPE and LENS)

• Use of the various OGSEs is required from June 01 – July 05

OGSE 3


OGSE 1 for Detector Module Performance Testing

• OGSE 1 consists of a cryostat, optics and cryogenic BB source, it provides IR-background and signals within later operational range of photon flux

• OGSE 1 will be located at MPE (2x) and at MPIA (1x)• MPE optics version „FIRSA“ was in use for EM1 – 6 tests

and will be replaced by OGSE 1 before QM, FM, FS module testing starts

• OGSE 1 is currently under final assembly (ready end March 01)

• OGSE 1 is designed for simultaneous tests on 4 resp. 7 modules (depending on the electronics set-up used)

OGSE 4


OGSE 1

cryoge n icb lack body30 -10 0K

test cryos tat4 .2K base plate

shu tter

baf flesy ste m

flatm ir ro r

con nectorb lock

1.7Khea ts ink

1.7K hous ing4.2K hous ing

f il te r

f /24

f il te r s-G e:G a d ete cto rm odule 1 .7K

con nector4 .2K

ø40 0m m

blockcon nector

OGSE 5


OGSE 1

4 .2 K b a s e p la tete s t c r y o s ta t

ø 4 0 0 m m

s h u t te r

f i l t e rm o d u le 1 .7 Ks -G e :G a d e te c to r

th e r m . in s u la to r

F E E 4 .2 K

4 .2 K h o u s in g

1 .7 K

s in kh e a t

f /2 4

b a f f les y s te m

3 0 -1 0 0 Kb la c k b o d yc r y o g e n ic

m ir r o r

1 .7 K h o u s in g

L H e

4 .2 K h e a t s in k

l ig h t c o n e a r r a y

OGSE 6


OGSE 2 for Detector Module #8 spectral and proton-irradiation Tests

• OGSE 2 consists of a LHe-dewar with optics (providing the right IR-background) and will be combined with – a tunable infrared source (OGSE 4) for the spectral

investigations on the Ge:Ga pixels– OGSE 2 will be located at LENS for this test – a 100 MeV proton source for the high energy particle

spike (transient) investigations– OGSE 2 will be located at PSI for this test

• OGSE 2 is under manufacture (ready July 01)

OGSE 7


OGSE2

ø 2 0

T U F IR s o u rc e

f/1 8

f /1 8 p a ra b o lo idw in d o w

a p e r tu re1 .7 K ø 3 m m

2 0 K

7 7 K

1 .7 K

PA C S 1 x 1 6 d e t e c to rm o d u le 1 .7 Ka n d C R E 4 .2 K

d e te c t o r te s t d e w a r ø 2 8 3 m m

l ig h tc o n e

in t e g ra t in gs p h e re

e le c tr ic a lc o n n e c to r

h o u s in g 1 .7 K

OGSE 8


OGSE 2

L H e 1 . 7 K

2 K2 0 K

7 7 K d e te c t o r te s td e w a r ø = 2 8 3 m m

h = 7 0 0 m m

fl a t m i r ro rs

e le c tr i c a lc o n n e c to r

a p e r tu reø 1 0 m m

b a n d p a s sf i l te r

f / 2 4

in te g r a t i n gs p h e re

l i g h tc o n e

a p e r tu re1 .7 K ø 3 m m

w in d o w

f/ 1 8 T U F IR in p u t

C R E 4 K h e a t s i n k

PA C S d e te c t o rm o d u l e 1 .7 Ka n d C R E 4 .2 K

l i g h t c o n e a r r a y

th e rm .in s u la to r

b a ff les y s te m

OGSE 9


OGSE 3 for instrument characterization Performance test and calibration activities with OGSE 3 will

comprise:• Sensitivity calibration of the photometer and spectrometer

sections of PACS• Wavelength calibration of PACS spectrometers• Characterization of spectral and spatial instrumental profiles for

point sources• Use of other external sources (e.g. gas cell) in addition to TUFIR• OGSE 3 consists of a big test cryostat, telescope simulator,

optics, BB and a window to feed-in outside cryostat IR-sources (OGSE 4 and others)

• during functionality/performance testing (ILT1, ILT2) the optics and the cryogenic BB is used (OGSE 3 will be located at MPE)

• during final wavelength calibration (ILT3) the optics and the tunable IR-source TUFIR is used (OGSE 3 will be located at LENS)

• OGSE 3 is currently under design (preliminary concepts are shown), it has to be ready for use July 02

OGSE 10


PACS Test Cryostat with OGSE 3

OGSE 11


Top view of test cryostat and optical beam of PACS FPU and telescope simulator

OGSE 12


Side view of test cryostat and optical beam of PACS FPU and telescope simulator

OGSE 13


OGSE 3 Schematic

T U F IR in p u t

m ir ro rim a g in g

m ir ro rfo ld

PA C S

fo c u se x te rn a l

F IR S T fo c u s ø 2 4 0

p u p il

+ X

+ Z

in te g ra t in gs p h e re

c o n el ig h t

OGSE 14


OGSE 3 Conceptual Design

+ Z

w in d o w sc ry o s ta t

m a s kp o in t s o u rc e

e x te rn a lm irr o rim a g in g

m ir r o rfo ld

in te g r a t in gs p h e re

f l ip m ir r o r

c ry o -f i l te rs

p o s .1

B B fo c u s

B B

+ Y

3 2

c o n el ig h t

9 6 0

fo c u s

p o in t s o u rc e

in te g r. s p h e reT U F IR in p u t

T U F IR in p u t

F IR S T fo c u s ø 2 4 0

te s t c ry o s ta t

PA C S

pu

pil

p u p i l

OGSE 15


OGSE 4 TUFIR Wavelength Calibrator

• The tunable IR-source TUFIR is based on a third order mixing of coherent radiation emitted by two carbon dioxide lasers and microwaves generated by a synthesizer on a metal-insulator-metal diode. A complete coverage of the FIR spectral range is provided. The spectral calibration requirements for PACS are defined in PACS-ME-PL-003.

• OGSE 4 is located at LENS• OGSE 4 is operational, adaptation of the beam to the

specific needs of PACS is necessary (ILT3 test activities start May 03)

OGSE 16


OGSE 4 Schematic representation of the TUFIR wavelength calibrator for PACS

OGSE 17


Cryogenic Blackbody Source (above) and example of anIncandescent Line Source combined with a Water Vapour Absorption Cell (below)

Documents

PACS IIDR ESTEC 01/02 March 2001 OGSE 1 PACS Instrument Intermediate Design Review (IIDR) Reinhard Katterloher OGSE