[Dsg-htcc] HTCC gas flow rate for KPP

[Brian Eng]

Nick called and requested Marc lower the flow rate to 2 slm, which as been done.

However, it will need to be raised at some point if the detector is to be ready in time for the KPP run.

> On Jan 23, 2017, at 4:33 PM, Brian Eng <beng at jlab.org> wrote:
> 
> Based on George's recommendation I had Marc set the flow to 6.5 slm remotely.
> 
>> On Jan 23, 2017, at 2:53 PM, George Jacobs <jacobsg at jlab.org> wrote:
>> 
>> Hi Youri,
>> 
>> I recommend you increase your CO2 flow rate. The current rate of 2 slm is too low. I recommend a flow of 6.5 slm until the KPP run  is completed.
>> 
>> The calculated flow rates for the HTCC are as follows;
>> Purge Flow - 20 slm - 1.5 volume exchanges per day- the detector volume will be purged in 3.4 days
>> Running Flow - 6.5 slm - 0.5 volume exchanges per day 
>> Reduced Flow - 3.25 slm - 0.25 volume exchanges per day
>> 
>> George