Fe parameters - UCAR

							Parameters for DST Horizontal Echelle Spectrograph
           28-Jun-2006
SPINOR: Sarnoff

Wavelength                       5250    Å                   l
Slit width                          50   microns             b
Focal length                     3040    mm                  L
Lines/mm                     308.5714     0.0032407        5 1/d             d
Spectral Pixel size                 16   microns             p
Spatial Pixel size                  16   microns
Grating length                    206    mm                  W
Blaze angle                   52.0000    deg
Incident Angle                56.3400    deg                 i
Order                               10                       m
slit length                     20.00    mm                  2*h                               4.3728
Image scale at slit            133.00    mm/arc-sec
Slit spatial sample               0.38   arc-sec
Detector spatial pixels        450.00    pixels
Detector spatial length           7.20   mm
Detector spectral pixels       512.00    pixels
Detector spectral length          8.19   mm
Chosen f/#                      36.00
Projected Grating Width        126.83    mm                  pw=Wcos(blaze)
Geometrical Width               84.44                        gw=fl/f#
Diffraction Width               63.84                        dw=2*l/b                            49.8            50.6
Illumination Width             105.86                        iw=sqrt(gw^2+dw^2)
Effective Width                105.86                        lesser of iw and pw                 48.3        46.77      51.7
Required Grating Length        171.91
Required Grating Height        104.44
Reflection angle              51.9672    deg          -4.373 q = asin ( m l /d - sin(i) )     4772.727 5833.333
Slit Magnification                0.90                       M=cos(i)/cos(q)                  4375.000 6562.500
Resolving Power               618263                         R = W(sin(i)+sin(q)) /l        not correct need eff.
Camera Lens fl                   1000    mm                  l
Dispersion                 5.008E+06     m/m                 lmd/cos(q)
                                0.501    microns/mÅ          D
Diffraction Resolution            8.49   mÅ                  l/R
Spectral pixel width            31.95    mÅ/pixel            p/D          l
Spectral slit width             29.54    mÅ                  l*b*M/DL
Spectral Resolution             44.33    mÅ                  RSS
Spectrum length                 16.36    Å
Spectrum curvature         1.424E-05     radians             sec(q) m l a^2 / 2d
                                43.28    microns              where a = h/L
                                  0.87   pixels                                                         pixels
Spatial coverage               149.53    arc-sec      164.57 cube size               15.5 mm                     398
Spatial Pixel size                0.37   arc-sec
Grating Efficiency              0.682                        i = sin(x)/x
Shading                         0.877                        where x = p m [cos(blaze) -
Total                           0.598                        sin(blaze)/tan((i+q)/2)]
                                                                     1.456


                                                              shade = 1. - sin(q - blaze)/sin(90. - blaze)
                                                                  0.877 incidence
                                                                  0.999 reflection

                                                                   0.877