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# conversion FPU angles in degrees to chopper readouts: # conversion FPU angles in degrees
#
to chopper readouts:
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# conversion chopper readouts to sky angle in arcmin : scaling factor 80.69 # conversion chopper readouts to sky angle
#
in arcmin : scaling factor 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
#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 chopPos2FpuAnglePol

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 : -23000 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

      -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

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

    • from all import *
      # conversion FPU angles in degrees 
      #to chopper readouts:
      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
      
      
      #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 chopPos2FpuAnglePol

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 = -12.8 mm
      • y = +1.2 mm
  • 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)