To: Victor Iguina, Joe Greene

From: Jon Hagen

Date: April7, 2004, June 8,2004, June12, May 31, 2005, July 18, 2005 Aug 22, 05

Subject: 430 Transmitter Priorities

00. Block out the old IPA controls on the console. Install the OFF/ON switch for the new IPA and also the remote status lights and reset button.

1.	Fix the klystron air pressure interlock switch

2.	Test K19 (modulator overcurrent) for proper operation. Document the auxiliary relays associated with K19.

3.	Install an auxiliary relay so that K19 (which turns on the magnet power supplies) doesn't divert so much current out of the interlock chain

4.	Radiator replacement. Have quote from Young Radiator. Get additional quotes.

5.	Test the arc detectors and repair if necessary.

6.	Design and build a tube tester for 3E29 & 4-400 modulator tubes.

7.	Troubleshoot magnet 8 of klystron A. Breaker trips. Turn breaker back on and magnet current does not appear until PA reset is pushed?? (Probable that one phase of the three feeding the magnet supplies has been connected to some relay?) For a start, locate a replacement circuit breaker and install it. (Procure spares for all the circuit breakers in the console).

Restore magnet meter interlocks

8.	Finish new high voltage bleeder chain: assemble and install five 3" corona rings.

9.	Oil Cooler installation

10.	Slow the eh tuner motors (slower motors or more gear reduction)

11.	Increase the length of R25, the Nichrome resistor between the klystrons and the hv supply. The original design calls for 75 ohms, but the present resistor is less than 30 ohms. Install proper corona donuts along this resistor.

12.	Expand the fiber transmitter box to include two additional outputs. Install 100 ohm pots on all four transmitters so that the light intensity can be reduced to test the thresholds of all four fiber links. Move this box outside the hv room, just to the side of the door. (Position it so that it will not be hit by the door to the room or the door to the klystron vault).

13.	Test the two new fiber receiver cards: measure the link thresholds (see above) in air and then under oil. Let the cards operate in a dish of oil for at least several days. Recheck the thresholds.

14.	Install the new fiber receivers on the modulator decks. For now, put the dual receivers in parallel to provide redundancy. (Later we may modify the decks so that the new fibers operate the 3E29 clamp tubes).

15.	Rebuild hv meter tower using two 150M resistors. Move the rebuilt tower from the inconvenient position almost blocking the door to near the side wall between the two capacitor bank bays.

16.	Update the manual to include documentation on the peak power meters.

17.	Install the spare peak power meter head in the console with DPM to monitor the tx output, i.e. the power leaving the waveguide combiner.

18.	Install console DPM for water temperature.

19.	Install console DPM for oil temperature.

20.	Install console meter (analog) for Duty cycle (10% f.s.) just a 1 ma meter with a series resistor of 3v/1ma = 3k connected to a TTL pulse output - Beam pulse (for beam duty factor) or RF pulse (for RF duty factor).

21.	Install analog console meter for waveguide reflected power ( Jaime's project).

22.	Install a console panel meter, circuitry, and cabling to read high voltage from the bleeder chain.

23.	Install console meter to measure eh tuner positions

24.	Install console readouts for the klystron cavity tuner positions

25.	receiver protection - monitor power incident on monoplexers/readout on console

26.	Build frame for new crowbar trigger

27.	Design/built new crowbar trigger circuitry

28.	Install a radiation 'smoke detector' on the mezzanine (radiation safety)

29.	Design, built, test, and install circuitry/procedures to measure receiver noise and gain recovery.