Differences between revisions 16 and 27 (spanning 11 versions)
Revision 16 as of 2007-03-08 14:58:13
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Revision 27 as of 2007-03-12 17:43:11
Size: 6346
Comment:
Deletions are marked like this. Additions are marked like this.
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  * Conversion wavelength - grating position:   * Conversion wavelength - grating position (based on ILT-1) :
     || Band || Order || Filter || wavelength || Grating position ||
     || R1 || 1 || n/a || 210um || 96K ||
     || || || || 100um || 991K ||
     || B2B || 2 || B || 100um || 301K ||
     || || || || 70um || 812K ||
     || B2A || 2 || A || 70um || 812K ||
     || || || || 53um || 1040K ||
     || B3A || 3 || A || 70um || 183K ||
     || || || || 50um || 740K ||

  * Other wavelengths in the PCSS:
    {{{
from spec import *

print wave2GratPos(105., "B2", 8, calVersion="FM_1_0")
print gratPos2Wave(1000000, "B2", 8, calversion="FM_1_0")

    }}}
Line 26: Line 44:
  * 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 relevant for Photometer
     || FPU Angle || Sky Angle || Chopper pos || Comment ||
     || -7.6 deg || -5.8 arcmin || -21350 || center CS1 (determined from PHOTO FoV map) ||
     || -2.1 deg || -1.75 arcmin || -6830 || Photometer chop field A (raster) ||
     || -0.37 deg || -26 arcsec || -1145 || Photometer chop field A (point source photometry) ||
     || 0.2 deg || 0 arcmin || 664 || Optical zero - value from Zeiss measurements ||
     || 0.8 deg || 26 arcsec || 2440 || Photometer chop field B (point source photometry) ||
     || 2.6 deg || 1.8 arcmin || 7660 || Photometer chop field B ||
     || 7.9 deg || 5.7 arcmin || 21200 || center CS2 (determined from PHOTO FoV map) ||

 * Conversion chopper position - angle on the sky - FPU angle relevant for Spectrometer
     || FPU Angle || Sky Angle || Chopper pos || Comment ||
     || -7.6 deg || -5.8 arcmin || -21350 || center CS1 (determined from PHOTO FoV map) ||
    || -3.8 deg || -3 arcmin || -12220 || large chopper throw A ||
     || -1.8 deg || -1.5 arcmin || -5743 || medium chopper throw A ||
     || -0.46 deg || -0.5 arcmin || -1442 || small chopper throw A ||
     || 0.2 deg || 0 arcmin || 664 || Optical zero - value from Zeiss measurements ||
     || 0.89 deg || 0.5 arcmin || 2727 || small chopper throw B ||
     || 2.25 deg || 1.5 arcmin || 6704 || medium chopper throw B ||
     || 4.3 deg || 3 arcmin || 12260 || large chopper throw B ||
     || 7.9 deg || 5.7 arcmin || 21200 || center CS2 (determined from PHOTO FoV map) ||
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# FPU angle : offset 650
print (664??? +) fpuAngle2ChopPosPol(Double1d([-4, 0, 4]))
# Sky angle : scaling factor 80.69
print ((664??? +)fpuAngle2ChopPosPol(Double1d([-4, 0, 4])))/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 ||
   || 8000 || 209 || 417 || 614 ||
   || 21200 (CS2) || 151 || 302 || 445 ||
  * At other positions - in the PCSS (release >20070303A):
    {{{
       bluePhotSky = 3.2 # Blue photometer pixel on the sky (arcsec)
       fpuAngle = -7.6 # degrees - chopper angle at which to calculate the delta position
       chopPos = fpuAngle2ChopPosPol(Double1d([fpuAngle]))
       offsetChopPos = fpuAngle2ChopPosPol(Double1d([fpuAngle - bluePhotSky * 80.69/3600])
       print offsetChopPos
    }}}
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    * Chopper position center : - TBD     * Chopper position center : -21350
Line 63: Line 120:
    * Chopper position center : + TBD     * Chopper position center : +21200
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    * Center spectro field :
       * x = -12.8 mm
       * y = +1.2 mm
    * 1 pixel = 9.4" = 1.692mm
    * Center spectro field :
      || || X stage (mm) || Y stage (mm) ||
      || RED || -12.7628 || 0.938300 ||
      || BLUE || -12.6774 || 1.15180 ||
 
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    * 1 blue pixel = 3.2" = 0.576mm
    * 1 red pixel = 6.4" = 1.152mm
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       * y = 0        * y = 1.5

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 (based on ILT-1) :
    • Band

      Order

      Filter

      wavelength

      Grating position

      R1

      1

      n/a

      210um

      96K

      100um

      991K

      B2B

      2

      B

      100um

      301K

      70um

      812K

      B2A

      2

      A

      70um

      812K

      53um

      1040K

      B3A

      3

      A

      70um

      183K

      50um

      740K

  • Other wavelengths in the PCSS:
    • from spec import *
      
      print wave2GratPos(105., "B2", 8, calVersion="FM_1_0")
      print gratPos2Wave(1000000, "B2", 8, calversion="FM_1_0")

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 relevant for Photometer
    • FPU Angle

      Sky Angle

      Chopper pos

      Comment

      -7.6 deg

      -5.8 arcmin

      -21350

      center CS1 (determined from PHOTO FoV map)

      -2.1 deg

      -1.75 arcmin

      -6830

      Photometer chop field A (raster)

      -0.37 deg

      -26 arcsec

      -1145

      Photometer chop field A (point source photometry)

      0.2 deg

      0 arcmin

      664

      Optical zero - value from Zeiss measurements

      0.8 deg

      26 arcsec

      2440

      Photometer chop field B (point source photometry)

      2.6 deg

      1.8 arcmin

      7660

      Photometer chop field B

      7.9 deg

      5.7 arcmin

      21200

      center CS2 (determined from PHOTO FoV map)

  • Conversion chopper position - angle on the sky - FPU angle relevant for Spectrometer
    • FPU Angle

      Sky Angle

      Chopper pos

      Comment

      -7.6 deg

      -5.8 arcmin

      -21350

      center CS1 (determined from PHOTO FoV map)

    • -3.8 deg

      -3 arcmin

      -12220

      large chopper throw A

      • -1.8 deg

        -1.5 arcmin

        -5743

        medium chopper throw A

        -0.46 deg

        -0.5 arcmin

        -1442

        small chopper throw A

        0.2 deg

        0 arcmin

        664

        Optical zero - value from Zeiss measurements

        0.89 deg

        0.5 arcmin

        2727

        small chopper throw B

        2.25 deg

        1.5 arcmin

        6704

        medium chopper throw B

        4.3 deg

        3 arcmin

        12260

        large chopper throw 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

        8000

        209

        417

        614

        21200 (CS2)

        151

        302

        445

    • At other positions - in the PCSS (release >20070303A):

      •        bluePhotSky = 3.2 # Blue photometer pixel on the sky (arcsec)
               fpuAngle = -7.6   # degrees - chopper angle at which to calculate the delta position
               chopPos = fpuAngle2ChopPosPol(Double1d([fpuAngle]))
               offsetChopPos = fpuAngle2ChopPosPol(Double1d([fpuAngle - bluePhotSky * 80.69/3600])
               print offsetChopPos

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 : -21350
  • CS2
    • 58 Ohm = 60K
    • Chopper position center : +21200

XY stage

  • Scale: 1" on the sky = 0.18mm
  • Spectrometer
    • Focus : +5mm (from FMILT-1, not incompatible with spectro FMILT-2)
    • 1 pixel = 9.4" = 1.692mm
    • 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)
    • 1 blue pixel = 3.2" = 0.576mm
    • 1 red pixel = 6.4" = 1.152mm
    • Center field :
      • x = 4 mm
      • y = 1.5

Herschel: FmIltProc/ReferenceNumbers (last edited 2009-07-15 14:32:37 by localhost)