Leveling the SI cart for removing/installing the blue EXES shell

To make the installation/removal of the blue shell more thought-free in the future, we took some measurements of the cart height and bubble level reading in a configuration where the blue shell slid off with no scraping of the mylar on the vapor shield.

Measuring to the floor from the 4 corners of the blue cart, we got 7", 7" on the starboard side, as mounted on the plane, looking forward. And 7 1/8", 7 1/8" on the port side.  ~7-8 threads were showing on the leveling jacks.

The blue can had been completely level in the horizontal position with triangle screws and all bolts attached. When it was removed the vapor shield was angled up slightly, seen in the bubble level reading below.

Slit positions

I've gone through and adjusted the slit angles in the GUI for slits 1-6.  My IDL journal file for processing the data is in eE/analysis/cd38/slitimag/checkimages.jou

I started by doing slit images of slits 6 to 1 a total of three times to check for repeatability.  Other than the very first Slit 6 position, the slits were repeatable to +-1 pixel.  That's better than I expected.

I was using the N04679 filter in the Dekker wheel, so I checked how the slits compared to the long-slit position in the Dekker and decided we were biased a little to far positive in angles.  This also let me look at the number of pixels/degree.  The slit center of rotation seems to be at very large y values (>>1024).  Near the lower end of the slit (y = 300), I find a conversion of -0.0228 degrees/pixel.

Using the second pass through the slits, it looked like most of the slits were aligned to 4 pixels or so.  Slit 2 was pretty far off.  Even though these are small numbers, I made adjustments.  I also wanted to get slits a little better centered in Dekker slit.

Slit       Was         Now
1           59.7         59.473
2           90            89.522
3           119.57     119.388
4           149.5       149.341
5           179.75      179.454
6           209.57      209.32

After I edited EXES_wheelinits.txt to insert the new positions, I took another spin from Slit 6 to Slit 1 and looked at the results.  Defining the center of Slit 6 as good and going by eyeball cuts...

Slit       # pixels off from Slit 6
1          0
2          1
3          0
4         -2
5          0

Using the conversion factor above (-0.0228 degrees per pixel), I made a further adjustment to slit 4:
from 149.341 to 149.387 degrees in wheelinits.txt

EXES Cold Clocks & Biases as of 4/26/18

This post is intended to serve as a digital record of the voltage measurements Bob took yesterday on the boards that contain the clocks and biases (EBox plate removed to access) with the Fluke.

Board 1 or Left Board

DC 1	-9.96 V
DC 2	-2.374 V
DC 3	-2.310 V
DC 4	-2.308 V
DC 5	-2.304 V
DC 6	-2.287 V
DC 7	+0.001 V
DC 8	-2.030 V
DC 9	-6.488 V
DC 10	-2.012 V
DC 11	-2.552 V
DC 12	-4.517 V

Board 2 or Right Board

DC 13	-5.189 V
DC 14	-0.303 V
DC 15	-2.024 V
DC 16	-3.276 V
DC 17	-2.279 V
DC 18	-2.011 V
DC 19	-0.001 V
DC 20	-1.387 V
DC 21	-5.802 V
DC 22	+0.006 V
DC 23	+0.023 V
DC 24	+1.003 V	V_pullup

Board 1 or Left Board

	Upper	Lower
CLK 1	-0.817 V	-1.782 V
CLK 2	-3.216 V	-0.824 V
CLK 3	-3.200 V	-0.778 V
CLK 4	-3.996 V	-3.983 V
CLK 5	-4.008 V	-4.039 V
CLK 6	-0.794 V	-0.772 V
CLK 7	-4.426 V	-2.053 V
CLK 8	-1.057 V	-6.015 V

Board 2 or Right Board

CLK 9	-5.909 V	-5.5953 V
CLK 10	-1.562 V	-3.192 V
CLK 11	-3.338 V	-1.793 V
CLK 12	-0.185 V	-0.061 V
CLK 13	-3.175 V	-0.801 V
CLK 14	-3.220 V	-0.794 V
CLK 15	-0.126 V	-3.167 V
CLK 16	-5.976 V	-5.988 V

CD037 Filter and Dekker Wheel Config

Wheel	Slot	Filter
Filter	1	open
Filter	2	BBP5500+MgF2
Filter	3	N07904+MgF2
Filter	4	Reading 6.2um + MgF2
Filter	5	N07053+CaF2
Filter	6	N07466+CaF2
Filter	7	BP14100
Filter	8	Soifer
Filter	9	OCLI ‘O’ + CaF2
Filter	10	Reading 18um
Filter	11	18a+ZnSe
Filter	12	BP13465+BaF2
Dekker	1	N04679+MgF2
Dekker	2	BP6000+BaF2
Dekker	3	BP6600+MgF2
Dekker	4	BBP5030+MgF2

CD36 Voltages at Start

Ebox DC & Clock Voltages
as of 15-Feb-2018
	DC	Purpose	Voltage
	01	unused	-9.95
	02	Vdd OutRef	-2.252
	03	Vdd Out4	-2.196	(-2.197)
	04	Vdd Out3	-2.192
	05	Vdd Out2	-2.186	(-2.187)
	06	Vdd Out1	-2.174
	07	Vgg UC	-0.04
	08	VSlew Ref	-1.502
	09	Vn Stat	-6.039	(-6.041)
	10	Vdd Cl	-2.013
	11	Vdd UC	-2.486
	12	Vdet	-3.504	~(-4.500)	for 2 V bias
	Clock	Purpose	Voltage
	01	VrstOff	-1.792
	02	ϕC1	-1.779	(-1.780)
	03	ϕC2	-1.746
	04	Vn Col	-3.988
	05	Vn Row	-4.045	(-4.046)
	06	Vp Row/Col	-0.772
	07	ϕRstOn	-2.089
	10	ϕRstOff	-3.185
	11	VRowOff	-1.796
	12	Vgg CL	-0.062
	13	ϕR2	-1.993
	14	ϕR1	-2.014	(-2.015)
	15	ϕRefEnable	-3.176