Send CIS Doppler Spec stuff to flr (Felix Reimold)


Looking from the top
if Ip = +ve
conventional current (opposite electorns) is flow anti-clockwise



Thursday - H-Alpha filter for Zeeman
	200 	rads
	201 	-
	202 	LEDs, ardSeq, probe test
	203 	rads
	------------
	204 	640x480, very low light
	205	low signal
	206-211	All ok, various FLC states
	212	Calib scan
	  -- aligned filter --
	213-215	Plasma again,
	216	Calib scan
	217-219	Plasma, 219 some bright
	220	Polariser at 4400
	221	Very bright
	222-341	All good, different BTs
	226	Good, +spark shower
	----------

Friday - Omega filter for MSE as Jan
	231 	Lamps with new positioning
	232 	Probe/trigger test
	--------------
	233	No beams
	234	Calib sweep (no beams)
	  -- re-aligned filter --
	236	Calib sweep with beams, 
	237 	OK beams data (multi-beam with reflections)
	238-239	blips only, but OK data
	240	Clear ramp-up data with beam3, clear sections with jump  beam2 and beam3. Ramp up has changes in core
	241	As 240 but multi-beam
	-----------------
	245	rads
	246	rads
	
Monday-Thursday	- 
	Alluxa+Omega filters, Hydrgen beams
	Lots of faffing with IMSE auto-advance/trigger
	while they were trying to get AUG restarted after venting
	Some data lost, lots of it noise, nsb, etc.
	Eventually some good data with beams assisting startup, plasma current should be very low with Bt=2.5T
	So angles should near Bt and equi should be well diagnosed. Some with edge in plama.
	System not disturbed during the 3 days.

	247	lamps, positioning, IR test & other misc faff
	248	
	-----------
	250	Nothing
	251-252	Weird rings
	253-319	No Data, Noise, or useless NSB
	320	First beam data with Alluxa, OK
	323	Good early beam data	
	325	Good early beam, 1 frame LFC off, 2 on
	326	Polariser at 6000, very weak fringes, early beam (θa = 24.30 (segC)), contrast = ~2.4%, θm ~ 17.3°
	328	Good early beam
	329	Polariser at 6000, early beam (θa = 24.30 (segC))
	330	Polariser at 6300, early beam (θa = 34.42 (segC))
	332	Early beam (+beam 2/3 mix)
	333	Polariser at 6600, early beam, still weak (θa = 44.54 (segC))
	-----------
	334	rads
	335	probe/trigger test
	------- Thrs -----
	336	Good early mixed beam
	337	Good polariser scan from 3700 during early beam (θa = -53.30 (= 36.70 in segA) to ??.?? (seg?)) *CALIB*
	338-340	Good early single/mixed beam	
	341	Polariser at 7200 (θa = 64.79 = 25.21 in segD)
	342-343	Good early mixed beam
	343-347	First full plasma, something interesting going on between 2-3s in top centre of image with no change in beams
	348	3 beam blips, all good. At least 1 pellet inbetween showing no significant intensity.
	351 	W-melting. Good beam3 during entire current ramp. Good multi-beam for the rest
	352	Polariser scan attempt (beam) - short pulse. Interlaced FLC ranging 45 - ~37° at the 3700 end.
	354	Polariser scan over 45-0 at 3700 end *CALIB*
	355	Good interlaced FLC data for multi-beam over whole W-melting pulse
	356-357	Good FLC off W-melting.
	358	beam3 in half of ramp-down
	------------------	
	360	rads
	361	rads
	362	Full polarisor scan with ne lamp in PEMs box.
	363-368	MSE ex-vessel polariser cross-check. Gives 25.00° as measurement.
	
	
	




MSE Ex-vessel Calib
	363-368 all give about µ=55%!! and θa=25.00 at θ(MSE-X)=0 (it jumps to θa=25.1 if setting µ=100% for fit)
	365 is long integration at unknown θa. θm in middle avg = 21.12°
	Fixing µ=55, gives θa ~ 29.35°
	Even with lots of time averaging, image is still noise
	  which means noise is from either demodulation, or instrument.... what?
	  oh... rads... yea
	So fit with ImgFitProcessor as 5x5

Polariser wheel (Ne Lamp)
	362 
	On full interlaced image, from all 4 corners, good in range 1900-3600 everywhere
	
	FLC off images (odd images, why???) give polarisation.

	µ~74% gives best fit. (higher than with MSE ex-vessel 
	because Ne lamp is more point-like source in PEMs box).

	Fit gives λ=10644.3 steps for 360°, should be ~ 10670±5 
	according to light barrier position (diff is 0.8° !!!). Fixing 
	λ=10670 only moves offset by 0.02°.

	Fit gives first 45° at step 3946, 0° at 5279.8 and next 45° 
	at 6613. This gives our calibration polariser relative to the 
	actual (µ corrected) incoming polarisation.
	This means polariser home is -133.14 ± 0.08° and the step to
	θa conversion (for µ calibration) is:
		θa = | STEP# - 5279.8 | * 360/10670    (± 0.1°)
	
	
	326	Polariser at 6000, very weak fringes, early beam (θa = 24.30 (segC)), ζ=~2.4%, θm ~ 17.3°
	329	Polariser at 6000, early beam (θa = 24.30 (segC)) ζ=2.6%,  θm=17.2°
	330	Polariser at 6300, early beam (θa = 34.42 (segC)), ζ=1.4%, θm=26.5°
	333	Polariser at 6600, early beam, still weak (θa = 44.54 (segC)), ζ(Q3)=2%, ζ(Q2+3)=1.1%), , θm~41°
	337	Good polariser scan from 3700 during early beam
			θa = -53.30 (= 36.70 in segA) to ??.?? (seg?))
			θm = ??? to ??? 
			ζ(Q3,θm=43(A))= ~8% at start, 
			ζ(Q2+3,θm=45(A/B))) =  5%
			ζ(Q2+3,θm=27.9(B))) =  7.7%
then increasing from 4.7% to 7.5% (but is beams3 and 2)

	341	Polariser at 7200 (θa = 64.79 = 25.21 in segD)
			ζ(Q3)=4.5%, ζ(Q2+3)=2.3% 
			θm=17°
			To get centre to 25.2° requires µ=73%

	352	Polariser scan attempt (beam) - short pulse. Interlaced FLC ranging 45 - ~37° at the 3700 end.
			θm=43.5 - 35.25 (segB)
			ζ(Q3) = 7.6% up to 9.3% (atθm=37.1°) [maybe back to 8.8% at end, but maybe just beam termination]
	354	Polariser scan over 45-0 at 3700 end *CALIB*
			θm=43 - 14.7 (segB)
			ζ(Q3,θm~42) = 7.3%
			ζ(Q2+3)) = 5.2% (at θm~42) to 8.3% (at θm ~ 16°)

			Using µ=73 from 341, gives θm(µ=73) = err...no
			
			Playing with the λ and φ of the fit, along with µ, gives 
				a variety of options, although it possible to see
				that extreme compensations of µ with λ and vice versa
				are wrong due to the non-linearity.
			All in all, I'd be confortable to say frame 24 has θa=21.7 ± 0.3°

			That matches the frame 0 step being ~ 3864, which requires 2 steps to be
			made before starting, which I have seen before - this needs lab testing 
                        of ardSeq to confirm. It would fix θa=21.8°.

			Using image 23 with θa=22.93

			


	


#Q3	
337	-47	8	0
326	24.3	2.4	0
329	24.3	2.6	0
330	34.42	1.4	0
333	44.54	2.0	0
341	64.81	4.5	0
352	-43.5	7.6	0
352	-35.25	9.3	0
354	-42	7.3	0

#Q2+3
337	-45	0	5
337	-27.9	0	7.7
333	44.54	0	1.1
341	64.81	0	2.3
354	-42	0	5.2
354	-16	0	8.3


From fft-p_351-f_33 image
	0 component looks to be from savart:
	(0,0) --> (+,0): 36.5°
	(+,+) --> (+,-): 127.95° --> 37.95 <-- this one is probably more accurate
	(+,+) --> (-,+): -143.06 --> 36.94
	(+,+) --> (-,-): 8.54 --> 36.46
	mean ~ 37.0 ± 0.6

	that's angle between savart and camera
	We know that the savart plate measures θa=-19.4 (+ve clockwise camera POV) for vertical: θf=0
		or -25.6° (so nticlockwise) is the first 45° point
	
	...whichis EXACTLY 10.1° from the 36.7 above
	hmmmmm, but... are all the segements correct??