Brewer Spectrometer Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== Filter Wheel Setup and Uses ======

This is just the standard filter wheel setup used on the Canadian Brewer Spectrophotometer Network. Other networks may differ

|   ^   Filter Wheel 1   ^^^^   Filter Wheel 2   ^^^
^Position|Steps|Attenuation|Filter|Notes|Steps|Filter|Notes|
^0|320|FP|Film Polarizer| 0|0|Clear|
^1|256|2.0|GQD2|Used for most measurements|64|0.5|ND1|
^2|192|3.0|ND6|Not used (Future Autosighting?)|128|1|ND2|
^3|128|0|Clear|Used during FZ, FM|192|1.5|ND3|
^4|64|4.5|GDQ2+2.5|Not Used|256|2.0|ND4|
^5|0|1.7|GDQ1|Used for DT/RS Measurement*|320|2.5|ND5|
In order to use Position 5 in filter wheel one in DT/RS, this must be enabled in [[ic|IC]]
Enter IC, and go down to "Second film polarizer" and press [key]h[/key]. This will change the name to "FW1@5 for DTRS"
The Canadian Brewer Spectrophotometer Network has done this achieve higher counts during DT/RS test. The ideal counts for DT is 3 million counts on the high intensity and 1 million counts on the low intensity. For RS we are aiming for 1 million counts for best results.

Shown below is the expected DI for filter wheel 1\\
{{:misc:fw1di.png?600|}}