EXES startup procedure

Comments will be used to update this post. Any reason not to put in passwords?



Turn on the CWR power, and EBOX power supply. Lakeshore 12 mW power, to setpoint, 7.000K

Turn on bryce and zion mac minis on the PI Rack.

After bryce is at the login prompt, you will probably be unable to move the mouse or type with the keyboard. If this is the case go pull out and reinsert the mouse/keyboard USB from the back of zion.

passwords
bryce: m*****s
zion: R*******

On bryce, open up CORD terminal. Go to gus, ipadd:10.xxxxxx. The login is gus, 4s****.

On CORD/gus, open the labview program: Desktop: reed/Labview229/____.vi

At this point, go to CORD menu and open a full screen session- you'll have to log in again, but sometimes this is necessary to get labview to initialize.

On the CORD/gus desktop, double click on the ACQ icon (Mighty Green Triangle)


On bryce, open ~/Desktop/EXES_GUI/startgui.??

Should open within ~5 sec. If it takes 20 sec, then it hasn't linked up to labview. In which case it will inform you that it found all motor mechanisms out of their last positions.

It will often find SLIT/DECKER in slightly off positions. This is due to some voltage drifts/winding in the mechanisms and pots. Maybe. but it is normal.


From the GUI, go to the initialization panel, and press "connect", and then "machwinit". If machwinit is successful, it should tell you that it loaded 80 opts tables or something similar. "no echo from hardware" could be disconnected Ebox, or fiber to the ebox ... something with the ebox.

Pressing "Update" on the inits page will tell you the next file index and directory will be.

From the instrument control panel, the waveno0 and order fields will be empty on startup. If you know the echelle order that the system was left in you can enter it in the spinner and the hit the refresh button. Otherwise, you can enter a new waveno0 and order and hit "setup" for the GUIs recommended mechanism positions for that combo. Make adjustments and hit "Move all".

Setup files are loaded from the Obs Setup screen with a button at the bottom.
Hit load, the directory will be something like "~/setupfiles_jul-aug-2015" and then directories are listed by flight number. Pick the one you want and it will import all the mechanical positions and observation parameters (OTs for flat, nod, NODN, NINTs).

It will not know about necessary changes to: dispersion driver, frametime, subarray modes, V_bias.

Hi-lo settings for CD22 flights

Testing the 3 HIGH_LOW settings for 03_0126 (Lee).

Summary: A similar setup for all three settings:

1. Slit6 (3.2")
2. Echelle order +2
3. 14-pix BP13465
4. Filter: OPEN

On the 260K blackbody, N0 D0 will work without issue (<3000 ADU).
The GUI setup in Waveno0 has an angular offset -- to get the WN you want at the center of the detector offset the waveno entered in the GUI by -5.6 cm-1.

Setting 1: 756.9cm-1, 2nd order, HIGH-LOW

Instrument Setup: Slit 6 (3.2"), 14-pix decker dash BP13465, FILTER=OPEN, EDEG=22.5611 degrees
On room: OT= N0 D0 T0, Frametime=1.0s

The waveno0 is off by about 5.6cm-1. We will have to adjust to best setting.
flux(room)/flux(260 K) ~ 1.6. Therefore, ND pairs on the blackbody will be comfortably below 3000 ADU.

756.9 cm-1, 2nd order, gas cell spectrum;
Real waveno0 appears to be ~ 762.56 cm-1

Histogram of pixel values in 11000-frame(*,*,1) of ND on ROOM.

Setting 2: 768.5 cm-1, 2nd order, HIGH-LOW

Instrument Setup: Slit 6 (3.2"), 14-pix dash BP13465, Filter" OPEN, EDEG= 22.1781 degrees

On room: OT= N0 D0 T0, Frametime=1.0s 

The waveno0 is off by about ~6 cm-1. We will have to adjust to best setting.

flux(room)/flux(260 K) ~ 1.65. Therefore, ND pairs on the blackbody will be comfortably below 3000 ADU. 

768.5 cm-1, 2nd order, gas cell spectrum;
Real waveno0 appears to be ~ 774.xx cm-1

Histogram of pixel values in 11000-frame(*,*,1) of ND on ROOM.

Setting 3: 745.6 cm-1, 2nd order, HIGH-LOW

Instrument Setup: Slit 6 (3.2"), 14-pix dash BP13465, Filter" OPEN, EDEG= 22.9468 degrees
On room: OT= N0 D0 T0, Frametime=1.0s

The waveno0 is off by about ~6 cm-1. We will have to adjust to best setting.

flux(room)/flux(260 K) ~ 1.65. Therefore, ND pairs on the blackbody will be comfortably below 3000 ADU.

Histogram of pixel values in 11000-frame(*,*,1) of ND on ROOM.

Gas Cell pressure broadened?

We may be unable use the available DAOF roughing pump to get the gas cell to low pressures necessary to see the true spectral focus. 

My usual procedure for pumping the cell is to put in C2H2, look at 729.5cm-1, 4th order spectra and pump down until the C^13CH2 lines disappear. I did so, and I've been finding disappointing R values for the spectra compared to in CD21. 

For this experiment I turned on the pump and opened the gas cell valve and took exposures at various times after starting. At the start the gas cell had already been pumped down (for 10 minutes at least), but was left untouched for an hour or so while I analyzed data. These are resolutions of fits to lines Q11-Q15 with the 1.9" slit. (Wavenumbers taken from default wavemap from pipeline. I didn't try to touch up the centering.



R (line1) R (line2) R (line3) R (line4) R (line5) time elapsed (min)
67312       71392       67032       73580       67660 0.0 min
72102       75955       70719       78602       71164 4.2 min
71317       76556       70699       77111       70998 6.5 min
71466       76373       70787       77540       70613 10.9 min
72578       75171       71248       78622       71367 17.0 min
73657       75134       71792       80275       72272 23.5 min

I think this suggests we haven't hit the true spectrograph width yet. We've never had to pump down this long ...

If we find another pump and try again that would be good. Regardless, I think we have to live with the results, since my earlier tests showed that we were at best focus on both high-med and medium modes (allowing for the compromise position we adopted in CD21).

UPDATE : 8/3/15-  Yes, the C2H2 lines were suffering pressure broadening.

MMcK used the turbo pump on the gas cell and discovered that the brass adaptor was leaking. 

He replaced it and took a new sequence of Q branch spectra as the cell was pumping down. 

Using file gascell.lab.00200.fits and fitting the lines in the same way as above, I got :

R (line1) R (line2) R (line3) R (line4) R (line5) time elapsed (min)

82205       82327       79504       83283       83683

83107       84126       79668       82536       82248 BEST R***

There were many files to choose from in the sequence, but there's a tradeoff for the quality between line strength, resolution and pumping time. Later I can check to make sure this is the ultimate resolution on slit4, but I think this proves the point that our performance hasn't changed since CD21.

***Update: 8/4/15  I checked the linewidths for all the files from Mark's pumpdown data. Of the ones with good line fits, the best R is file gascell.lab.00202.fits. Therefore, we can expect about R=83000 with slit4.