Differences between revisions 15 and 22 (spanning 7 versions)
Revision 15 as of 2007-03-08 14:56:54
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Revision 22 as of 2007-03-09 13:33:19
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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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     || 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     ||
     || FPU Angle || Sky Angle || Chopper pos || Comment               ||
     || - 8.5 deg || -6.32 arcmin || -21350 || center CS1 (determined from PHOTO FoV map) ||
     || -4 deg || -2.97 arcmin || -12101 ||               ||
     || 0 deg || 0 arcmin || 664 || Optical zero - value from Zeiss measurements ||
     || +4 deg || 2.97 arcmin || 12431 ||               ||
     || + 8.5 deg || 6.32 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
# conversion FPU angles in degrees
# to chopper readouts (assuming optical zero of 664 based on Zeiss measurements):
print 664 + fpuAngle2ChopPosPol(Double1d([-4, 0, 4]))
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664???: optical zero, not known yet, must first be defined and measured!
you get angles referred to the mechanical zero by using fpuAngle2ChopPosPol or chopPos2FpuAnglePol, 664 is the best guess from Zeiss
# conversion chopper readouts to sky angle
# in arcmin : scaling factor 80.69
print chopPos2FpuAnglePol(Double1d([-12101, 0, 12431])))*60./80.69
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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

      - 8.5 deg

      -6.32 arcmin

      -21350

      center CS1 (determined from PHOTO FoV map)

      -4 deg

      -2.97 arcmin

      -12101

      0 deg

      0 arcmin

      664

      Optical zero - value from Zeiss measurements

      +4 deg

      2.97 arcmin

      12431

      + 8.5 deg

      6.32 arcmin

      +21200

      center CS2 (determined from PHOTO FoV map)

  • Other angles - in the PCSS (release >20070303A) :

    • from all import *
      # conversion FPU angles in degrees 
      # to chopper readouts (assuming optical zero of 664 based on Zeiss measurements):
      print 664 + fpuAngle2ChopPosPol(Double1d([-4, 0, 4]))
      
      # conversion chopper readouts to sky angle
      # in arcmin : scaling factor 80.69
      print chopPos2FpuAnglePol(Double1d([-12101, 0, 12431])))*60./80.69

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

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