MPE - Ge:Ga Detector Array 1/16 PACS SVR: 22/23 June 2006 Ch. Hartinger / L. Barl Ge:Ga Detector Arrays
Jan 19, 2016
MPE - Ge:Ga Detector Array 1/16
PACS SVR: 22/23 June 2006
Ch. Hartinger / L. Barl
Ge:Ga Detector Arrays
MPE - Ge:Ga Detector Array 2/16
PACS SVR: 22/23 June 2006
Overview
• Performance results of FM HS Modules• Status of the LS & HS Array Integration
MPE - Ge:Ga Detector Array 3/16
PACS SVR: 22/23 June 2006
8 Test Runs (32 modules)
MPE Test Equipment Improvements•10 filter capacitors at the connector distribution panel inside the cryostat•Sense lines for the VDDA, VSS, GRD, VDDr and Zero_bias supply lines •Optics include only a black body, 1 mirror but no attenuation filters•Stability of BB temperature is < 1 mK
Standard Measurements•Warm functional test at RT checks the supply currents•Cold functional test at 4 K and the output frames
•Cold performance test (1.85 K)-Dark current-Noise Equivalent Power (NEP) -Responsivity
FM HS Modules
MPE - Ge:Ga Detector Array 4/16
PACS SVR: 22/23 June 2006
Mean Dark Current of FM HS Detector Modules at T=1.85K
0
100000
200000
300000
400000
500000
600000
700000
800000
0 20 40 60 80 100
bias [mV]
dark
cu
rren
t [e
/s]
FM153FM158FM159FM160FM161FM162FM164FM165FM168FM169FM170FM171FM172FM173FM174FM175FM176FM177FM179FM180FM181FM183FM184FM186FM187FM188FM189FM190FM192FM196
Dark current
• Background of 4.2 K corresponds to a flux < exp(-18) W/pixel
Cold Performance Test
MPE - Ge:Ga Detector Array 5/16
PACS SVR: 22/23 June 2006
Mean dark current of FM HS Detector ModulesT=1.85K, Bias=50mV
0
20000
40000
60000
80000
100000
120000
140000
FM
15
3
FM
15
8
FM
15
9
FM
16
0
FM
16
1
FM
16
2
FM
16
4
FM
16
5
FM
16
8
FM
16
9
FM
17
0
FM
17
1
FM
17
2
FM
17
3
FM
17
4
FM
17
5
FM
17
6
FM
17
7
FM
17
9
FM
18
0
FM
18
1
FM
18
3
FM
18
4
FM
18
6
FM
18
7
FM
18
8
FM
18
9
FM
19
0
FM
19
2
FM
19
6
da
rk c
urr
en
t [e
/s]
Dark current
• Strong variation between modules
Cold Performance Test
MPE - Ge:Ga Detector Array 6/16
PACS SVR: 22/23 June 2006
Noise Equivalent Power (NEP)
• The modules behave very similar up to a bias of 70mV, where the sensitivity is maximal
Mean NEP at 1.85K, C=0.14pF, P=2.4e -15W
1E-18
1E-17
1E-16
1E-15
0 20 40 60 80 100
bias [mV]
W/√
Hz
FM159
FM161
FM162
FM168
FM180
FM186
Cold Performance Test
FM164: NEP for 4 flux levels, T=1.85K, C=0.14pF
1E-18
1E-17
1E-16
1E-15
0 20 40 60 80 100
bias [mV]
W/√
Hz
P=2.4e-15 WP=4.2e-15 WP=1.0e-14 WP=4.0e-14 W
• The NEP is strongly dependent on the flux
MPE - Ge:Ga Detector Array 7/16
PACS SVR: 22/23 June 2006
Responsivity
• The responsivity varies by more than a factor 3 for different modules• The arrangement in the detector array was chosen according to the
responsivity
Cold Performance Test
Mean responsivity of all FM HS detector modules
T=1.85K, Bias=70mV, P=4e-14W/pix
0
10
20
30
40
50
60
70
80
90
100
FM
153
FM
158
FM
159
FM
160
FM
161
FM
162
FM
164
FM
165
FM
168
FM
169
FM
170
FM
171
FM
172
FM
173
FM
174
FM
175
FM
176
FM
177
FM
179
FM
180
FM
181
FM
183
FM
184
FM
186
FM
187
FM
188
FM
189
FM
190
FM
192
FM
195
FM
196
r [A
/W]
MPE - Ge:Ga Detector Array 8/16
PACS SVR: 22/23 June 2006
Distribution of the Responsivity in the TEL Focal Plane
The modules with the high values were positioned at the center of the array
HS Integration
MPE - Ge:Ga Detector Array 9/16
PACS SVR: 22/23 June 2006
Homogeneity of the Responsivity
Each module has its own characteristic distribution not caused by an inhomogeneous flux
FM174: almost homogeneous
FM190: strong gradient
Cold Performance Test
MPE - Ge:Ga Detector Array 10/16
PACS SVR: 22/23 June 2006
Reproducibility of the measurements
FM189
0
10
20
30
40
50
60
70
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
detector number
r [A
/W]
HS 4, pos 5
HS 6, pos 4
FM171
0
20
40
60
80
100
120
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
detector number
r [A
/W]
HS 1c, pos 4
HS 6, pos 2
Very good reproducibility of the data points after two tests (FEE changed)
Multiple tests of modules at different positions in the set-up
Different distribution between the two tests (FEE exchanged, connections re-glued)
Cold Performance Test
The test optics delivers a nearly homogeneous flux distribution
MPE - Ge:Ga Detector Array 11/16
PACS SVR: 22/23 June 2006
HS-Modules Status after Integration
25 modules integrated
• 2 open pixels• 2 pixel connections cut
2 calibrated temperature sensors (FM161 + FM168)
HS-Detector Status
ESD protection by aluminized cigarette wrapping paper during the integration
MPE - Ge:Ga Detector Array 12/16
PACS SVR: 22/23 June 2006
Arrangement of the HS-Modules
HS-Detector Status
Front view of the HS-detector
MPE - Ge:Ga Detector Array 13/16
PACS SVR: 22/23 June 2006
Arrangement of the LS-Modules
X(a
t Det
ecto
r)A
BC
DE TEL Focal P lane
ABCDE
24191494
20151050
Y
Z24
2019
109
54
0C hop
FM 113FM 115FM 119FM 136FM 111
FM 132FM 116FM 128FM 114
FM 120FM 123FM 137FM 131FM 121
FM 126FM 118FM 130FM 135FM 107
FM 112FM 133FM 134FM 125FM 108
FM 122
P ixe l 12
34
56
78
910
11 1314
1516
W orking
O pen P ixe l
SU
PP
LY G
RO
UP
3S
UP
PLY
GR
OU
P 4
TEMP SENS
TEMP SENS
P ixel ??
P ixe l connection cut
25 modules integrated
• in FM 107 + FM 135 behavior of few pixels undetermined • 3 open pixels• 1 pixel connection was cut
2 calibrated temperature sensors (FM132 + FM135)
LS-Detector Status
MPE - Ge:Ga Detector Array 14/16
PACS SVR: 22/23 June 2006
Mechanical Design Blue Detector
Array
FM Blue Detector Assembly – Integration Status
FM PACS Blue Detector Array
Integration Status
Mechanical Parts
Blackened Baffles
Cable Mount BD
4K Post BD
Integration Tool BD
HP Heater
Harness
Flasher
Sapphire
Filter FLBS
25 Detector Modules
Suspension Feet
Distribution BD
Cooling Strap BDASTECMPEKT QMC J.B.
MPE - Ge:Ga Detector Array 15/16
PACS SVR: 22/23 June 2006
FM Red Detector Assembly – Integration Status
Detector Modules with FO
4K Cooling Staps
Flat Mirror
Housing Frame
Filter Mount (5 Stripes)
Baffle Frame Baffling
System
Clamping Device
Filter
2K Cooling Stap I/FSapphire
FilterBaffles
Mechanical Design Red Detector
Array
FM PACS Red Detector Array
Integration Status
Mechanical Parts
Blackened Baffles
Mirror Red Detector
Cable Mount RD
4K Post RD
Integration Tool RD
HP Heater
Harness
Flasher
Sapphire
Filter FLRS1 RD
25 Detector Modules
Suspension Feet
Distribution RD
Cooling Strap RD
Filter FLRS2 Pupil RDASTECMPEKT QMC J.B.
MPE - Ge:Ga Detector Array 16/16
PACS SVR: 22/23 June 2006
Work in Progress
• Bake out at 80°C for 3 days
• Final inspection prior to delivery to KT
• Warm functional test after cold vibration test