Engineering 2011JunJul - Revision history

141.213.173.117 at 04:00, 22 July 2011

2011-07-22T04:00:05Z

← Older revision		Revision as of 04:00, 22 July 2011
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	fast mode, GDT gain +0.05, 15 accumulate, StoSL 5, SLtoL 20000: effective, keeping fringes		fast mode, GDT gain +0.05, 15 accumulate, StoSL 5, SLtoL 20000: effective, keeping fringes


			== 2011 July 21 ==

			(SK) Today, the CHAMP failure occurred again.
			As a new test, we only rebooted the CHAMP computer, but
			did not reset the electronics.
			If the problem would only be related to the CHAMP electronic,
			we would expect that a reboot of the computer would not be
			sufficient to recover after a failure.
			We find that after 1-2 attempts, we could recover with the computer
			reboot, which seems to suggest that the problem is either
			related to the computer itself (motherboard etc.?) or a
			connected component.

			We have now a functioning version of the calibration tool.
			However, more work might be needed in order to test it and to
			calibrate the values for all beams.

Monnierast: /* 2011 July 17 */

2011-07-19T08:18:10Z

2011 July 17

← Older revision		Revision as of 08:18, 19 July 2011
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	FB: Champ focusing notes [[Media:champ_focusing.txt]]		FB: Champ focusing notes [[Media:champ_focusing.txt]]

			Phasing with MIRC on sky, pickoff ealing mirror values:

			IR1 183539


			fast mode, GDT gain +0.05, 15 accumulate, StoSL 5, SLtoL 20000: effective, keeping fringes

Monnierast: /* 2011 10 July */

2011-07-19T00:48:29Z

2011 10 July

← Older revision		Revision as of 00:48, 19 July 2011
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	New good position for IR3, 160523		New good position for IR3, 160523

			Final notes on the pickoff alignment: [[Media:pico_debug.txt]]

	== 2011 July 16 ==		== 2011 July 16 ==

192.153.157.220: /* 2011 July 17 */

2011-07-19T00:40:39Z

2011 July 17

← Older revision		Revision as of 00:40, 19 July 2011
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	(SK)		(SK)
	CHAMP Readout problem happened again at the beginning of the day-shift. CHAMP electronics was at room temperature. Tried to reboot. Exchanged CHAMP fibers with MIRC fibers, but without success. Switched MIRC fiber pair, but without success. Works on second try after reboot (the correct MIRC fiber orientation is with blue ribbon at the top).		CHAMP Readout problem happened again at the beginning of the day-shift. CHAMP electronics was at room temperature. Tried to reboot. Exchanged CHAMP fibers with MIRC fibers, but without success. Switched MIRC fiber pair, but without success. Works on second try after reboot (the correct MIRC fiber orientation is with blue ribbon at the top).

			Notes from observing during the night:

			Fringe positions:

			fringe 1:

			fringe 2: -0.047

			fringe 3: 0.030

			fringe 4: -0.085

			fringe 5: 0.011

			fringe 6: 0.435

			bug: FT offset RESET and INIT does the same thing

			look what FT numbers mean

			MWC361: typically around 50 counts on MWC361 on all baselines (20 counts minimum)

			time delay in fringe plot

			fringe found at -1.9 at W1-W2 at 4:55

			high SNR, seeing 5(W1)-3.4(W2), around 50 counts (relatively poorly focused beams)

			INIT on one baseline changes mode on other baseline

			w1 reference, total offset 1.75 mm

			FB: Champ focusing notes [[Media:champ_focusing.txt]]

192.153.157.220 at 19:02, 17 July 2011

2011-07-17T19:02:25Z

← Older revision		Revision as of 19:02, 17 July 2011
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	(SK)		(SK)
	CHAMP Readout problem happened again at the beginning of the day-shift. CHAMP electronics was at room temperature. Tried to reboot. Exchanged CHAMP fibers with MIRC fibers, but without success. Switched MIRC fiber pair, but without success.		CHAMP Readout problem happened again at the beginning of the day-shift. CHAMP electronics was at room temperature. Tried to reboot. Exchanged CHAMP fibers with MIRC fibers, but without success. Switched MIRC fiber pair, but without success. Works on second try after reboot (the correct MIRC fiber orientation is with blue ribbon at the top).

192.153.157.220 at 18:56, 17 July 2011

2011-07-17T18:56:03Z

← Older revision		Revision as of 18:56, 17 July 2011
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	next step: when problem happens. first try use MIRC fiber. if that fails, then we further focus on the champ pci card. matt anderson is mailing us the spare card on monday so we can test this component separately on tuesday.		next step: when problem happens. first try use MIRC fiber. if that fails, then we further focus on the champ pci card. matt anderson is mailing us the spare card on monday so we can test this component separately on tuesday.

			== 2011 July 17 ==

			(SK)
			CHAMP Readout problem happened again at the beginning of the day-shift. CHAMP electronics was at room temperature. Tried to reboot. Exchanged CHAMP fibers with MIRC fibers, but without success. Switched MIRC fiber pair, but without success.

Monnier at 03:42, 17 July 2011

2011-07-17T03:42:13Z

← Older revision		Revision as of 03:42, 17 July 2011
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	New good position for IR3, 160523		New good position for IR3, 160523


			== 2011 July 16 ==

			(JDM)
			More problems with CHAMP readout. The most common symptom is that the system will return error codes during 'config camera.' The first settings always work -- including nrows, ncols, reset controller, load tim.lod, etc. The error usually start with frames per reset, nreads, and setting the bias voltages.

			In order to isolate the failing compoment, we started to use MIRC hardware.

			Started tests:
			'''Champ computer, Champ fiber, Champ electronics == FAIL'''

			'''Champ computer, Champ fiber, MIRC electroncis == FAIL '''
			(this suggests either champ computer or champ fiber. i.e, champ electronics OK)

			'''MIRC computer, MIRC fiber, CHAMP electrnoics == PASS'''
			(this is consistent with champ computer or champ fiber as problem

			'''Champ computer, MIRC fiber, Champ electronics == PASS'''

			'''Champ computer, CHAMP fiber, Champ electrnoics == PASS'''
			(crap! this is where we started. so the system is now working! This could mean
			it has to do with a blocked fiber port on the champ card. or just basic flakiness
			in the pci card for champ)

			next step: when problem happens. first try use MIRC fiber. if that fails, then we further focus on the champ pci card. matt anderson is mailing us the spare card on monday so we can test this component separately on tuesday.

192.153.157.220: /* 2011 10 July */

2011-07-11T04:58:21Z

2011 10 July

← Older revision		Revision as of 04:58, 11 July 2011
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	Verniers init		Verniers init
	M1 : 0.26		M1 : 0.26

	M2 : 5.08		M2 : 5.08

	M3 : 2.96		M3 : 2.96

	M4 : 2.98		M4 : 2.98

	M5 : 4.24		M5 : 4.24

	M6 : 3.02		M6 : 3.02

Line 126:		Line 131:

	W1W2 on B1B2:		W1W2 on B1B2:

	B2: 5.08 -> Retro = 3.35		B2: 5.08 -> Retro = 3.35

	B2: 5.0 -> Retro = 3.43		B2: 5.0 -> Retro = 3.43

	B2: 4.8 -> Retro = 3.63		B2: 4.8 -> Retro = 3.63

	B2: 4.3 -> Retro = 4.11		B2: 4.3 -> Retro = 4.11

	B2: 3.38 -> Retro = 5.02 / OK		B2: 3.38 -> Retro = 5.02 / OK

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	50 microns OPD+ on Ealing offset IR2 = 35 microns RETRO		50 microns OPD+ on Ealing offset IR2 = 35 microns RETRO

	+100 microns IR2, 5.432 -> 5.554 on newport		+100 microns IR2, 5.432 -> 5.554 on newport

	+500 microns IR2, 5.554 -> 6.02		+500 microns IR2, 5.554 -> 6.02

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	B2B3 init retro fringes 6.731		B2B3 init retro fringes 6.731

	M2 2.96 -> M3 2.5, retro 6.731 -> 7.18		M2 2.96 -> M3 2.5, retro 6.731 -> 7.18

	IR3 init 173123		IR3 init 173123

	-200 Microns on IR3, retro 6.98		-200 Microns on IR3, retro 6.98

	-1050 Microns on IR3, retro 5.94 OK		-1050 Microns on IR3, retro 5.94 OK

	New good position for IR3, 160523		New good position for IR3, 160523

192.153.157.220: /* 2011 10 July */

2011-07-11T04:09:02Z

2011 10 July

← Older revision		Revision as of 04:09, 11 July 2011
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	== 2011 10 July ==		== 2011 10 July ==

			We want to phase MIRC, CHAMP, and optical combiners, as well as put the vernier on the far right mirror to center of their positions. To do this

	Verniers init		Verniers init
Line 121:		Line 123:


	B1 moved to 2.5		M1 moved to 2.5

	W1W2 on B1B2:		W1W2 on B1B2:

192.153.157.220: /* 2011 7 July */

2011-07-11T04:07:12Z

2011 7 July

← Older revision		Revision as of 04:07, 11 July 2011
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	3.6 seconds		3.6 seconds

			== 2011 10 July ==

			Verniers init
			M1 : 0.26
			M2 : 5.08
			M3 : 2.96
			M4 : 2.98
			M5 : 4.24
			M6 : 3.02


			B1 moved to 2.5

			W1W2 on B1B2:
			B2: 5.08 -> Retro = 3.35
			B2: 5.0 -> Retro = 3.43
			B2: 4.8 -> Retro = 3.63
			B2: 4.3 -> Retro = 4.11
			B2: 3.38 -> Retro = 5.02 / OK

			Realigning 5.33

			50 microns OPD+ on Ealing offset IR2 = 35 microns RETRO
			+100 microns IR2, 5.432 -> 5.554 on newport
			+500 microns IR2, 5.554 -> 6.02

			M2: 3.38 -> 2.5 Newport 6.02 -> 6.854

			IR2 new good position = 168360

			B2B3 init retro fringes 6.731
			M2 2.96 -> M3 2.5, retro 6.731 -> 7.18

			IR3 init 173123
			-200 Microns on IR3, retro 6.98
			-1050 Microns on IR3, retro 5.94 OK

			New good position for IR3, 160523