SCUBA-2 with FTS and 80K blackbody source

2. Define the optical system of SCUBA-2 (include the telescope and sky)
Assume cosine weighting of beam which illuminates optics and telescope (see definition later)
Insert extra optics in the Tel_optics matrix below:
Tel_optics :=
⎢
⎡
⎢
⎢
⎢
⎢
⎣
Det_optics :=
"Surface"
⎡
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎣
"Sky"
"Primary-sec"
"Cabin optics"
2 6
FTStrans := 2⋅TrBS ⋅TrM
"Feed optics"
"Window"
"Blocker"
"optic"
"optic"
"CS-filter"
"CS aperture"
"dichroic"
"field mirror"
"edge filter"
"bandpass"
"detector"
"Temperature"
280
280
150
4
4
1
1
1
1
0.1
0.1
0.1
270
280
280
1 ( 0.995⋅Ruze) 3
−
0.02
0.05
1 − 0.995⋅Ruze 1 − 0.995⋅Ruze 1 − 0.95
1
0.05
1 − 0.995⋅Ruze 0.1
0.1
0.2
"emissivity"
( )
1 − Trans A, pwv,
ν , Δν
1 − 0.95⋅0.92 1 ( 0.995⋅Ruze) 4
−
net transmission of telescope beam through FTS
FTStrans = 0.437
( )
Spectrometer := "FTS" 280 0 FTStrans 0 AΩsys⋅I( n)
0 0
( 0.995⋅Ruze) 3
0.98
0.95
0.995⋅Ruze 0.995⋅Ruze 0.95
1
0.95
0.995⋅Ruze 0.9
0.9
0.8
0
0
0
0
0
0
0
0
0
0
0
1.0
n ≡ 1
"trans"
( )
Trans A, pwv,
ν , Δν
0.95⋅0.92 ( 0.995⋅Ruze) 4
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩpixel
AΩpixel
AΩpixel
AΩpixel
AΩpixel
AΩpixel
0
0
0
0
0
0
0
0
0
0
0
0
I( n)
= 0.901
0
0
0
0
0
0
0
0
0
0
0
0
⎤
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎥
⎦
"net trans"
1.0
0
0
"AOmega"
AΩsys⋅I( n)
AΩsys⋅I( n)
AΩsys⋅I( n)
εM := 1 − 0.995⋅Ruze εBS := 0.025
TrM := 0.995⋅Ruze TrBS := 0.475
The factor of I(n) is to account for the fact that the beam
which illuminates the telescope is not flat (assume a
circularly symmetric cosine^n weighted field with
intensity of 0.5 (3db's) at the edge of the primary.
"Pback (pW)"