Description

Page : 737

Sondrestrom Lidar Operation Log

Operator(s) : E.Guðmundsson
Purpose : Testing TX halfwaveplate configuration in the dye laser path.
Date(s) : 010115 - 010116
File(s) : L101152 - L101163
Comments : Most of the run went into getting the dye halfwaveplate set up and tested.

Last few hours of the run contain Raylaigh data as well.
Logfile : l0101150.log

Setup:0

Page : 738
[Variables]
Dye Power=75mJ

[0]
Iris=2mm
Rayleigh System=Off
Dye System=On
Daystar=Out
Polarizer=In
HalfWave Plates=In
Rayleigh Filter=2:532(.5nm)

[1]
Iris=2mm
Rayleigh System=On
Dye System=On
Daystar=Out
Polarizer=In
HalfWave Plates=In
Rayleigh Filter=2:532(.5nm)

Logsheet:0

Page : 739

Sondrestrom Lidar Operation Log

Log Sheet 1 of 4
Operators : E.Guðmundsson
Date(s) : 010115 - 010115
File(s) : L101152 - L101152

Files	Time [UT]	Comments	Cnt	S	Ope
L101152	21:51:27	Start of experiment	0	0	EG
L101152	21:52:38	Additional setup Info: Halfwave plate in the TX path of the		0	EG
		Dye laser and is adusted to give the same polarization out
		of the laser as it was prior to the HWP installation. This
		Was determined by the use of a polarizing analyser in
		conjnction with a photodiode in the diagnistics path of
		the laser.
		Noutral setup number as read from the mount is 100deg ,
		referance marking on the top side of the mounte.
L101152	21:56:24	Starting the experiment by macximizing the tuning of the		0	EG
		sodium, Note the plain mirror is still in the receiver.
L101152	21:59:36	Tuned to 589.155nm to 589.156nm	0	0	EG
L101152	22:09:11	MAxed out now. Removing the HWP to see if there is any	0	0	EG
		difference. MAx wavelength was 589.158nm-589.159nm
L101152	22:13:12	The Dye TX HWP is out of the path now.		0	EG
L101152	22:15:15	I notice a very slight change in the counts		0	EG
L101152	22:23:24	Tx HWP put in the path and the starting number is 100deg.		0	EG
L101152	23:11:36	Done aligning, TX HWP at 100deg		0	EG
L101152	23:19:43	TX HWP 110deg		0	EG
L101152	23:23:34	TX HWP 115deg		0	EG
L101152	23:27:37	TX HWP 120deg		0	EG
L101152	23:32:02	TX HWP 125deg		0	EG
L101152	23:35:11	TX HWP 130deg		0	EG
L101152	23:38:08	TX HWP 135deg		0	EG

Logsheet:1

Page : 740

Sondrestrom Lidar Operation Log

Log Sheet 2 of 4
Operators : E.Guðmundsson
Date(s) : 010115 - 010116
File(s) : L101152 - L101161

Files	Time [UT]	Comments	S	Ope
L101152	23:43:53	TX HWP 140deg	0	EG
L101152	23:48:12	TX HWP 145deg	0	EG
L101152	23:52:02	TX HWP 100deg to check if things have changed from start	0	EG
L101152	00:07:34	Starting to change to the Na Dicroic, Incremented.	0	EG
L101160	00:08:36	Usiing the HWP routine as feedback meckaninsm	0	EG
L101161	00:49:14	Running again with the dicroic in place.	0	EG
L101161	00:50:55	Converging the sodium channel	0	EG
L101161	01:03:32	The first counts after converging the sodium channel are	0	EG
		disapointing.
L101161	01:08:39	Converged again, It's proving more difficult to converge	0	EG
		using the picomotors due to the time it takes to get
		feedback from the scope.
L101161	01:13:51	Doing a quick check to see if the HWP has effect	0	EG
		Changing HWP position from 100 to 145 (90deg rotation)
L101161	01:43:29	Changing back to 100deg	0	EG
		The sum of sodium changes to much
L101161	01:56:11	TX HWP 105deg	0	EG
L101161	02:01:08	TX HWP 110deg	0	EG
L101161	02:05:50	TX HWP 115deg	0	EG
L101161	02:10:54	TX HWP 120deg	0	EG
L101161	02:13:08	TX HWP 125deg	0	EG
L101161	02:21:10	TX HWP 130deg	0	EG
L101161	02:25:54	TX HWP 135deg	0	EG
L101161	02:31:08	TX HWP 140deg	0	EG

Logsheet:2

Page : 741

Sondrestrom Lidar Operation Log

Log Sheet 3 of 4
Operators : E.Guðmundsson
Date(s) : 010116 - 010116
File(s) : L101161 - L101163

Files	Time [UT]	Comments	Cnt	S	Ope
L101161	02:35:17	TX HWP 145deg		0	EG
L101161	02:40:28	TX HWP 100 deg		0	EG
L101161	02:45:19	Note TX HWP back to 145deg		0	EG
L101161	02:56:55	Pausing data collection		0	EG
L101161	03:19:59	Resuming experiment. icremented		0	EG
L101162	03:21:14	TX HWP (dye) at 100deg.		0	EG
L101162	03:30:04	TX HWP (dye) at 145deg		0	EG
L101163	03:36:02	Running with the Rayleigh system now, incremented	15	1	EG
L101163	03:38:38	dye HWP at 100deg		1	EG
L101163	03:57:37	Rayleigh Convergence mirror adjusted	5937	1	EG
L101163	03:58:58	Preparing to move the chopper altitude down on the sodium		1	EG
		Channel, moving down by 15km (100usec)
L101163	04:02:57	Changed delay from 3910.00usec to 4010.00usec	9193	1	EG
L101163	04:04:37	This is causing a lot of afterpulsing or signal induced noise	9193	1	EG
L101163	04:05:07	Setting dye TX HWP to 145 or max attenation on the		1	EG
		Rayleigh section of the profile, still signal induced noise
L101163	04:15:39	Although less than before.		1	EG
L101163	04:15:16	Changed sodium chopper delay to 3960.00us (chopper	8876	1	EG
		up by 7.5km km). No signal induced noise after that
L101163	04:43:43	Changed sodium chopper delay to 3970.00us (Chopper		1	EG
		down by 1.5km). No signal induced noise now.
L101163	04:56:39	Chopper delay set to 3980usec (Chopper down by 1.5km)	8885	1	EG
L101163	05:00:59	This last change produced signal induced noise as seen at the		1	EG
		Top side of the Rayleigh profile of the sodium.

Logsheet:3

Page : 742

Sondrestrom Lidar Operation Log

Log Sheet 4 of 4
Operators : E.Guðmundsson
Date(s) : 010116 - 010116
File(s) : L101163 - L101163

Files	Time [UT]	Comments	Cnt	S	Ope
L101163	05:00:46	Chopper altitude raised again by 10usec (1.5km) by settng	8958	1	EG
		the dye laser chopper delay to 3970.00us
L101163	05:13:07	There might be a very slight signal induced noise effect on	8888	1	EG
		the sodium profile, pushing the chop alt. up by 750m
		or 5usec to 3965.00us
L101163	05:27:53	End of experiment	8838	1	EG