[Dsg-rtpc] [EXTERNAL] Re: Helium for Bonus Experiment

Tue Mar 24 11:19:44 EDT 2020

Anyway that we can get a quick check of the labeled mixtures for each
bottle?

-Eric

On Tue, Mar 24, 2020 at 11:17 AM Sebastian Kuhn <kuhn at jlab.org> wrote:

> Hello Sebastian,
>
> I asked Morgan to show me the full gas bottles. In that place I saw only
> two full bottle ordered on 9-13. Again, these are other than what we have
> connected now.
>
> Thank you,
> Jiwan
>
>
> On Mar 24, 2020 10:19, Sebastian Kuhn <kuhn at jlab.org> wrote:
>
> Dear Jiwan and Bob,
>
> if possible, can we get an inventory of all HeCO2 bottles we still have?
> (I.e, how many full bottles do we have on site other than the 2 that will
> be connected to the RTPC at the gas pad)?
>
> Thanks - Sebastian
>
> So if those 2 were already ordered last year, then we should still expect
> to have 4 more bottles (see below) that were ordered - no idea whether they
> arrived and, if so, where they are. This would give us an inventory of 6
> gas bottles (worth about 6 weeks of running should we be allowed to come
> back online).
>
> - Sebastian
>
> Begin forwarded message:
>
> *From: *Bob Miller <rmiller at jlab.org>
> *Subject: **Re: Helium for Bonus Experiment*
> *Date: *February 28, 2020 at 9:42:53 AM EST
> *To: *Sebastian Kuhn <kuhn at jlab.org>, Denny Insley <dinsley at jlab.org>
>
> Sebastian,
>
> Based on the PO, 4 bottles of mixed gas for the RTPC are due to arrive
> March 10th.
>
> Bob
>
>
> On 2/27/2020 10:44 AM, Sebastian Kuhn wrote:
>
> Just to be sure: Did this order go out? We will definitely need new gas
> “soon”.
>
> Thanks - Sebastian
>
> On Feb 10, 2020, at 10:27 AM, George Jacobs <jacobsg at jlab.org> wrote:
>
> The following is the ordering info for the specialty gas mixture. The
> Praxair part number for the special gas mixture, 20% CO2 in Helium, is HE
> CD20C-K. The most recent quote was $330 per cylinder with a 4-6 week lead
> time.
>
> Thank you
> George
>
> --
> George Jacobs
> Jefferson Lab (TJNAF)
> STE 12
> 12000 Jefferson Ave.
> Newport News, VA 23606
> (office) 757-269-7021
> (email) jacobsg at jlab.org
> (url) https://userweb.jlab.org/~jacobsg
>
>
> ------------------------------
> *From:* Sebastian Kuhn <kuhn at jlab.org>
> *Sent:* Saturday, February 8, 2020 4:53 PM
> *To:* George Jacobs <jacobsg at jlab.org>
> *Cc:* Carlos Ayerbe Gayoso <gayoso at jlab.org>; Bob Miller <rmiller at jlab.org>;
> Jiwan Poudel <jpoudel at jlab.org>; Stephen Bültmann <sbueltma at odu.edu>;
> dsg-rtpc at jlab.org <dsg-rtpc at jlab.org>; Mohammad Hattawy <
> mohammad.hattawy at gmail.com>
> *Subject:* Re: Helium for Bonus Experiment
>
> Dear George,
>
> it’s been awhile since we checked on our RTPC drift gas supply, but today
> we noticed that the 2 bottles that are connected at the gas pad are both
> showing very low pressure (about 350 psi out of 2000 for a fresh bottle -
> not sure whether that is real, but it certainly is a concern - note that we
> only hooked up our RTPC in the Hall today, so I’m not sure why those
> bottles appear nearly empty). I found 4 more gas bottles of the same type
> stored next to the Hall B gas shed, which should account for the total of
> 6. Those should tide us over the first few weeks of the run. I believe
> there may be one or 2 gas bottles left in the EEL that are at most
> partially used. However, to avoid running out during the experiment and
> because of the lead time, I would like to request that we order 4 more of
> the same 80%/20% He/CO2 premix and store them next to the gas shed. Let me
> know if you have any questions about this.
>
> Thanks - Sebastian
>
> On Oct 15, 2019, at 1:13 PM, George Jacobs <jacobsg at jlab.org> wrote:
>
> Hi Carlos,
>
> There are currently 5 full cylinders of pre-mix gas in the EEL gas cage.
> The last order of 4 cylinders arrived last month. These cylinders were for
> testing the actual detector in the EEL.
>
> I can order more cylinders for delivery to 96B, if that is what you need.
> There is a 4-6 week lead time for delivery of this pre-mix gas. Does your
> estimate of 4 cylinders for the run take into acccount any contingency?
> Additional gas may be required in the case of an accidental loss of gas for
> some reason such as a leak or an improper gas supply configuration. I would
> recommend ordering at least 6 cylinders if you estimate the need at 4, with
> a contingency of at least 2 cylinders just in case. The lead time of 4-6
> weeks eliminates the option of ordering more during the run.
>
> Cheers,
> George
>
> --
> George Jacobs
> Jefferson Lab (TJNAF)
> STE 12
> 12000 Jefferson Ave.
> Newport News, VA 23606
> (office) 757-269-7021
> (email) jacobsg at jlab.org
>
>
> ------------------------------
> *From:* Carlos Ayerbe Gayoso <gayoso at jlab.org>
> *Sent:* Tuesday, October 15, 2019 11:49 AM
> *To:* Bob Miller <rmiller at jlab.org>; Sebastian Kuhn <kuhn at jlab.org>;
> Jiwan Poudel <jpoudel at jlab.org>; Stephen Bültmann <sbueltma at odu.edu>;
> George Jacobs <jacobsg at jlab.org>
> *Cc:* dsg-rtpc at jlab.org <dsg-rtpc at jlab.org>
> *Subject:* Re: Helium for Bonus Experiment
>
> George,
>
> may you give us the status of the He/CO2 order?
>
> Thank you
>
> -Carlos
> ------------------------------
> *From:* Bob Miller <rmiller at jlab.org>
> *Sent:* Tuesday, October 15, 2019 7:37 AM
> *To:* Carlos Ayerbe Gayoso <gayoso at jlab.org>; Sebastian Kuhn <
> kuhn at jlab.org>; Jiwan Poudel <jpoudel at jlab.org>; Stephen Bültmann <
> sbueltma at odu.edu>
> *Cc:* dsg-rtpc at jlab.org <dsg-rtpc at jlab.org>
> *Subject:* Re: Helium for Bonus Experiment
>
> Hi Carlos,
>
> Please send an update when the He/CO2 order is confirmed and you have a
> delivery date.
>
> I will check the He4 inventory in Hall B.
>
> Regards,
> Bob
>
> On 10/14/2019 3:11 PM, Carlos Ayerbe Gayoso wrote:
>
> Hi Bob,
>
> in principle, the 4 bottles of He/CO2 were in the list to buy them soon,
> and I believe they are already ordered because the delivery time was quite
> long. He4 not quite sure if was intended to buy it exclusively for BONuS or
> use the present in the hall.
>
> Cheers
>
> -Carlos
> ------------------------------
> *From:* Sebastian Kuhn <kuhn at jlab.org> <kuhn at jlab.org>
> *Sent:* Monday, October 14, 2019 2:12 PM
> *To:* Carlos Ayerbe Gayoso <gayoso at jlab.org> <gayoso at jlab.org>; Jiwan
> Poudel <jpoudel at jlab.org> <jpoudel at jlab.org>; Stephen Bültmann
> <sbueltma at odu.edu> <sbueltma at odu.edu>
> *Subject:* Fwd: Helium for Bonus Experiment
>
> Can you reply to Bob (with cc to me).?
> Thanks - Sebastian
>
> Begin forwarded message:
>
> *From: *Bob Miller <rmiller at jlab.org>
> *Subject: **Helium for Bonus Experiment*
> *Date: *October 14, 2019 at 8:11:15 AM EDT
> *To: *Sebastian Kuhn <kuhn at jlab.org>
>
> Hi Sebastian,
>
> Based on the Bonus flow requirement of 1 gas exchange per hour, the
> experiment will need 4 bottles of He4/CO2 (K bottles, 2000 psi).  The
> experiment will also need 1 bottle of He4.
>
> Has this gas been ordered?
>
> Thanks,
>
> --
> Bob Miller
> Hall B Lead Engineer
> Jefferson Lab
> 757 822-9586
>
>
>
> --
> Bob Miller
> Hall B Lead Engineer
> Jefferson Lab
> 757 822-9586
>
>
>
>
> --
> Bob Miller
> Hall B Lead Engineer
> Jefferson Lab
> 757 822-9586
>
>
>
>
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