Miniproposals

Miniproposal: 042 Date Filed: 4/6/1994 Title: Power Supply and Hybrid Dynamics Characterization. First Author: Gerry Tinios Session Leader: Gerry Tinios (shots 1-16)

Engineering Operator Run Comment

power supplies dynamics characterization

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments
Apr 26 1994 10:54:55:600AM		Gerry Tinios	After some initial power supply tests, this run will attempt to follow MP #42. On the side, Artur will test his pressure gauge, and some up-down symmetric shots (OH1, EF3, EF4) will be used to debug magnetics (flux loop 17 in particular).
Apr 26 1994 11:08:30:760AM	940426001	Gerry Tinios	TF only.
Apr 26 1994 11:15:13:790AM	940426002	Gerry Tinios	TF only, 100kA.
Apr 26 1994 11:24:57:830AM	940426003	Gerry Tinios	OH1 only. 10 kA.
Apr 26 1994 11:35:30:680AM	940426004	Gerry Tinios	EF3 only 6 kA. Fault at -0.5 sec
Apr 26 1994 11:56:18:900AM	940426005	Gerry Tinios	EF3 only again.
Apr 26 1994 12:26:26:730PM	940426006	Gerry Tinios	EF4 only. 4 kA
Apr 26 1994 02:35:58:620PM	940426007	Gerry Tinios	TF finally declared cold! PLC readings were warmer than actual temperature. This shot uses all coils, including TF. It is the platform on which all shots for MP#42 are based. Disaster! Only TF and chopper worked properly. One of the other coils had a fault at -0.5 and tripped all the others.
Apr 26 1994 02:52:19:400PM	940426008	Gerry Tinios	Run EF3 only on hybrid control. The TF temperature rose by 50 degrees with the last shot, so that we decided to disable it for the rest of the day.
Apr 26 1994 03:08:12:050PM	940426009	Gerry Tinios	EF2's and EF3. In this shot there is no current feedback gain after t=0, but voltage programming (from the hybrid as well). EF3 fault shutdown.
Apr 26 1994 03:34:49:710PM	940426010	Gerry Tinios	Hybrid control of EF3 (as per previous shot) and PLC control of EF2's. EF2's worked. EF3 did not.
Apr 26 1994 03:57:02:480PM	940426011	Gerry Tinios	EF2's and EF3 disabled. All other coils under hybrid control. TF flattopping from -1 to 0. (for pressure gauge calibration). Oh2U had oscillations programmed into it. Sustaining voltage for OH1 was small so Oh1 current is decaying and carrying OH2's along with it.
Apr 26 1994 04:33:12:220PM	940426012	Gerry Tinios	Same as previous shot, with following differences: 1) OH1 sustaining voltage up to 40V 2) All coils ramp up faster 3) Larger proportional gain during the current feedback phase Controllers after t=1 ought to have been nonzero. But they were not. Therefore the power supplies kept going.
Apr 26 1994 04:42:47:370PM	940426013	Gerry Tinios	Current feedback until t=0. Then no feedback; coils are left free to coast down. The current feedback is turned back on at t=1.
Apr 26 1994 05:25:40:840PM	940426014	Gerry Tinios	This time current feedback is used during the entire shot. currents are ramped up, left at flattop, and ramped down. EF3 did not work
Apr 26 1994 05:30:44:210PM	940426015	Gerry Tinios	Repeat previous shot. EF3 worked. OH and EF1 commutation resistors were inadvertently left in and turned off at 0.1sec for OH's and 0.2 sec for EF1's.
Apr 26 1994 05:42:43:120PM	940426015	Gerry Tinios	Repeat previous shot. EF3 worked. OH and EF1 commutation resistors were inadvertently left in and turned off at 0.1sec for OH's and 0.2 sec for EF1's.

Physics Operator Comments

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:55:07:790AM	Test	Ok	power tests
2	11:07:36:970AM	Test	Ok	power tests
3	11:20:05:590AM	Test	Ok	power tests
4	11:29:51:400AM	Test	Ok	power tests
5	11:42:18:890AM	Test	Ok	power tests
6	12:14:26:300PM	Test	Ok	power tests
7	02:11:19:020PM	Test	Bad	ef3 fault
8	02:42:31:570PM	Test	Ok	ef3 ok
9	02:52:56:970PM	Test	Bad	ef3 fault, no ef2
10	03:10:30:970PM	Test	Bad	ef3 test
11	03:40:38:540PM	Test	Ok	sine wave driving
12	04:02:04:710PM	Test	Ok	OH2 hybrid test
13	04:29:38:900PM	Test	Ok	Test with OH1, OH2, EF1, and TF
14	04:45:47:290PM	Test	Ok	Good Test
15	05:04:24:460PM	Test	Ok	no faults
16	06:25:33:970PM	Test	Bad