E907 TPC Cathode Test May 2003

Date: Mon, 5 May 2003 14:36:55 -0500 (EST)
From: David Eric Miller 
To: Rajendran Raja 
Cc: David Eric Miller , Peter Barnes ,
   Pierrick Hanlet 
Subject: Re: HV plot

Hi Raja and Peter!

I can plot the TPC data for you but I don't remember
what format you wanted.  I can also put it on the web
page.  The data is at the end of this email
for your immediate satisfaction.

About the connectors, wires and o-rings:

If Peter has the gaskets for me then
I can put the connectors into the TPC at any time.
Otherwise I need to get the material and punch
out some gaskets myself.

I have a 2 conductor plus ground to isolated ground
BNC bulkhead connector bushing potted here at Lab 6.
However, to open the TPC, run the wires and repair the
o-rings I will need at least one person to help.
Two people helping would be much better.

Peter, should I use vacuum grease on the gaskets?


-david eric miller

p.s.  Here is the TPC data.

May 2nd, 2003
1.5 scfh N2 flow rate @ 5 psig
Power Supply Trip Setting 1.01 mA
Note: High Voltage Toggle Switch Light is inactive.
Note: Water from heavy rain is on the floor in the
	clean room.  Humidity is probably 100%.

Volts	Micro-Amps
-1002	-8.4
-1537	-12.8
-2002	-16.5
-2501	-20.5
-3001	-24.5
-3502	-28.6
-4012	-32.6
-4505	-36.6
-5001	-40.6
-5506	-44.7
-6003	-48.6
-6515	-52.7
-7016	-56.7
-7555	-61.0
-7998	-64.6
-8502	-68.6
-9006	-72.6
-9255	-74.6
-9522	-76.8
-9757	-78.7
-10005	-80.6	<--Raja inspects chamber:	"No sparking heard."
-10266	-82.7   <--Raja inspects chamber:	"No sparking heard."
-10510	-84.6   <--Spark heard.  Power Supply Tripped.

Power Supply Reset.
-128	-1.3
-1000	-8.4	<-- Same current draw as before spark.  Wires unbroken.




On Mon, 5 May 2003, Rajendran Raja wrote:

> Hi Dave,
>
> Do you have the HV plot for the TPC yet? if not you can give me the page from the log book and I can plot it.
>
> Also, when do you think you will be able to put in the connectors and repair the gasket for the TPC? I will be away next week so perhaps we can get  to it this week?
>
> I realize that you are busy with chamber 4 move, which must have priority.
>                                        best regards
>
>                                            Rajendran Raja
>                                            Fermilab,
>                                            WH13E, Rm 1327
>                                            Tel: 630-840-4092
>                                            Fax: 630-840-6311
>