Size: 2887
Comment:
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Size: 3739
Comment:
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Deletions are marked like this. | Additions are marked like this. |
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* Accessible range : -23000 to +23000 | * Accessible range : -23500 to +23000 |
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* Conversion chopper position - angle on the sky - FPU angle : || FPU Angle || Sky Angle || Chopper pos || Comment || || - 8.5 deg || -6.32 arcmin || -23382 || center CS1 || || -4 deg || -2.97 arcmin || -12101 || || || 0 deg || 0 arcmin || 0 || Mechanical zero || || +4 deg || 2.97 arcmin || 12431 || || || + 8.5 deg || 6.32 arcmin || 22347 || center CS2 || |
* Conversion chopper position - angle on the sky - FPU angle || FPU Angle || Sky Angle || Chopper pos || Comment || || -7.6 deg || -5.8 arcmin || -21350 || center CS1 (determined from PHOTO FoV map) || || -2.2 deg || -1.8 arcmin || -6700 || Photometer chop field A || || 0.2 deg || 0 arcmin || 664 || Optical zero - value from Zeiss measurements || || 2.7 deg || 1.8 arcmin || 8000 || Photometer chop field B || || 7.9 deg || 5.7 arcmin || +21200 || center CS2 (determined from PHOTO FoV map) || |
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# conversion FPU angles in degrees to chopper readouts: print (664??? +) fpuAngle2ChopPosPol(Double1d([-4, 0, 4])) |
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# conversion chopper readouts to sky angle in arcmin : scaling factor 80.69 print chopPos2FpuAnglePol(Double1d([-12101, 0, 12431])))*60./80.69 |
chopPositions = Double1d([-21350.,-6700., 664., 8000., +21200.]) # CS1, PhotLeft, Center, PhotRight, CS2 # Chopper positions to FPU angles (deg) print chopPos2FpuAnglePol(chopPositions) # Chopper positions to Sky angles (arcmin) print chopPos2FpuAnglePol(chopPositions-664)*60/80.69 |
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#664???: optical zero, not known yet, must first be defined and measured! #664 is the best guess for the optical zero using Zeiss measurements. #you get angles referred to the mechanical zero by using fpuAngle2ChopPosPol or #chopPos2FpuAnglePol |
# FPU angles (deg) to Chopper positions fpuAngles = Double1d([-4, 4]) print fpuAngle2ChopPosPol(fpuAngles) # Sky angles (arcmin) to Chopper positions skyAngles = Double1d([-3, 3]) print 664 + fpuAngle2ChopPosPol(skyAngles/60*80.69) |
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* Chopper step to move over one pixel - depends on chopper position || Chop pos || Blue phot (3.2") || Red phot (6.4") || Spectro (9.4") || || -21350 (CS1) || 163 || 325 || 476 || || -6700 || 218 || 436 || 640 || || 664 || 221 || 441 || 648 || || 2.7 deg || 209 || 417 || 614 || || 7.9 deg (CS2) || 151 || 302 || 445 || |
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* Center spectro field : * x = -12.8 mm * y = +1.2 mm |
* Center spectro field : || || X stage (mm) || Y stage (mm) || || RED || -12.7628 || 0.938300 || || BLUE || -12.6774 || 1.15180 || |
FM ILT reference numbers
Ge:Ga detector settings
- Blue
par
value
comment
Bias d
198 mV
From bias / heater loop test
Bias r
10 mV
Component level value - to be verified on CRE checkout test
Heater
1.5 mA
Result from bias / heater loop test (2.68K/1.84mA) exceeds thermal budget
- Red
par
value
comment
Bias d
69 mV
From bias / heater loop test
Bias r
10 mV
Component level value - to be verified on CRE checkout test
Grating
- Configuration table: CONFGrat. Column : FMILTFast / FMILT_R_Fast for redundant
- Allowed working range :
- 45K - 1045K (nominal)
- 65K - 1065K (redundant)
- Conversion wavelength - grating position:
Chopper
- !!! Do NOT use the chopper in redundant mode !!!
- Configuration table CONFChopper / column : CSLopt3-600
- Accessible range : -23500 to +23000
- At +/- 25000 a field plate limit disables the controller
- Conversion chopper position - angle on the sky - FPU angle
FPU Angle
Sky Angle
Chopper pos
Comment
-7.6 deg
-5.8 arcmin
-21350
center CS1 (determined from PHOTO FoV map)
-2.2 deg
-1.8 arcmin
-6700
Photometer chop field A
0.2 deg
0 arcmin
664
Optical zero - value from Zeiss measurements
2.7 deg
1.8 arcmin
8000
Photometer chop field B
7.9 deg
5.7 arcmin
+21200
center CS2 (determined from PHOTO FoV map)
Other angles - in the PCSS (release >20070303A) :
from all import * chopPositions = Double1d([-21350.,-6700., 664., 8000., +21200.]) # CS1, PhotLeft, Center, PhotRight, CS2 # Chopper positions to FPU angles (deg) print chopPos2FpuAnglePol(chopPositions) # Chopper positions to Sky angles (arcmin) print chopPos2FpuAnglePol(chopPositions-664)*60/80.69 # FPU angles (deg) to Chopper positions fpuAngles = Double1d([-4, 4]) print fpuAngle2ChopPosPol(fpuAngles) # Sky angles (arcmin) to Chopper positions skyAngles = Double1d([-3, 3]) print 664 + fpuAngle2ChopPosPol(skyAngles/60*80.69)
- Chopper step to move over one pixel - depends on chopper position ||
Chop pos
Blue phot (3.2")
Red phot (6.4")
Spectro (9.4")
-21350 (CS1) || 163 || 325 || 476 || || -6700 || 218 || 436 || 640 ||
664
221
441
648
2.7 deg
209
417
614
7.9 deg (CS2)
151
302
445
Filter Wheel PHOT
- POS A = Long wavelength (Green)
- POS B = Short wavelength (Blue)
Filter Wheel SPEC
- POS A = Short wavelength (50-70um)
- POS B = Long wavelength (70-100um)
Calibration sources
- CS1
- 48 Ohm = 55K
- Chopper position center : - TBD
- CS2
- 58 Ohm = 60K
- Chopper position center : + TBD
XY stage
- Scale: 1" on the sky = 0.18mm
- Spectrometer
- Focus : +5mm (from FMILT-1, not incompatible with spectro FMILT-2)
- Center spectro field :
X stage (mm)
Y stage (mm)
RED
-12.7628
0.938300
BLUE
-12.6774
1.15180
- Photometer
- Focus : +5mm (from FMILT-1)
- Center field :
- x = 4 mm
- y = 0