[Bonuslist] Fwd: Saclay mission in january for Bonus

[kuhn]

FYI

> Begin forwarded message:
> 
> From: Aune Stephan <stephan.aune at cea.fr>
> Subject: RE: Saclay mission in january for Bonus
> Date: December 7, 2018 at 7:41:56 AM EST
> To: "burkert at jlab.org" <burkert at jlab.org>, kuhn <kuhn at jlab.org>, "rmiller (rmiller at jlab.org)" <rmiller at jlab.org>, Raffaella De Vita <Raffaella.Devita at ge.infn.it>, Yuri Gotra <gotra at jlab.org>
> Cc: DEFURNE Maxime <Maxime.Defurne at cea.fr>, SABATIE Franck <Franck.Sabatie at cea.fr>, BOSSU Francesco <francesco.bossu at cea.fr>, MANDJAVIDZE Irakli <irakli.mandjavidze at cea.fr>, Granelli Rémi <remi.granelli at cea.fr>, "VANDENBROUCKE Maxence" <Maxence.VANDENBROUCKE at cea.fr>
> 
> Hi Jlab
>  
> We propose to come at Jlab from the 7 to the 21 of January
>  
> First week for MVT-FTT work in hall B (access to MVT and FTT)
> Second week for Bonus meeting and test MVT-FTT in hall B
>  
> The technical team will be composed, in addition to our physicists (Maxime and/or Francesco), Me, Rémi (~ MVT), Quentin (~gaz-MVT), Irakli(DAQ)
>  
> Cheers
> Stephan
>  
> De : Aune Stephan 
> Envoyé : vendredi 23 novembre 2018 13:52
> À : 'burkert at jlab.org <mailto:burkert at jlab.org>' <burkert at jlab.org <mailto:burkert at jlab.org>>; 'kuhn' <kuhn at jlab.org <mailto:kuhn at jlab.org>>; rmiller (rmiller at jlab.org <mailto:rmiller at jlab.org>) <rmiller at jlab.org <mailto:rmiller at jlab.org>>; 'Raffaella De Vita' <Raffaella.Devita at ge.infn.it <mailto:Raffaella.Devita at ge.infn.it>>; 'Yuri Gotra' <gotra at jlab.org <mailto:gotra at jlab.org>>
> Cc : DEFURNE Maxime <maxime.defurne at cea.fr <mailto:maxime.defurne at cea.fr>>; SABATIE Franck <Franck.Sabatie at cea.fr <mailto:Franck.Sabatie at cea.fr>>; BOSSU Francesco <francesco.bossu at cea.fr <mailto:francesco.bossu at cea.fr>>; MANDJAVIDZE Irakli <irakli.mandjavidze at cea.fr <mailto:irakli.mandjavidze at cea.fr>>; Granelli Rémi <remi.granelli at cea.fr <mailto:remi.granelli at cea.fr>>; VANDENBROUCKE Maxence <maxence.vandenbroucke at cea.fr <mailto:maxence.vandenbroucke at cea.fr>>
> Objet : RE: Saclay mission in january for Bonus
>  
> Hi Jlab
>  
> We will have an internal meeting next week at Saclay, Thursday or Friday, to organize our coming in January.
>  
> Could you tell us your feeling about this mission for BoNuS12, BMT gas and FTT (mail bellow)
>  
> Yuri, Bob; Maxime told me you have planned to have the dry air around the plastic line.
> Please confirm. If so it is good, this is then under way, less for us when we will come.
>  
>  
> Cheers
> Stephan
>  
>  
> De : Aune Stephan 
> Envoyé : lundi 19 novembre 2018 13:52
> À : 'burkert at jlab.org <mailto:burkert at jlab.org>' <burkert at jlab.org <mailto:burkert at jlab.org>>; 'kuhn' <kuhn at jlab.org <mailto:kuhn at jlab.org>>; rmiller (rmiller at jlab.org <mailto:rmiller at jlab.org>) <rmiller at jlab.org <mailto:rmiller at jlab.org>>; 'Raffaella De Vita' <Raffaella.Devita at ge.infn.it <mailto:Raffaella.Devita at ge.infn.it>>
> Cc : DEFURNE Maxime <maxime.defurne at cea.fr <mailto:maxime.defurne at cea.fr>>; SABATIE Franck <Franck.Sabatie at cea.fr <mailto:Franck.Sabatie at cea.fr>>; BOSSU Francesco <francesco.bossu at cea.fr <mailto:francesco.bossu at cea.fr>>; MANDJAVIDZE Irakli <irakli.mandjavidze at cea.fr <mailto:irakli.mandjavidze at cea.fr>>; Granelli Rémi <remi.granelli at cea.fr <mailto:remi.granelli at cea.fr>>; VANDENBROUCKE Maxence <maxence.vandenbroucke at cea.fr <mailto:maxence.vandenbroucke at cea.fr>>
> Objet : RE: Saclay mission in january for Bonus
>  
> Dear Volker
>  
> Thank you for your proposal of a meeting in January, it is a good thing to meet for the BoNuS12.
>  
> Also we propose to come to Jlab for two other needs, for MVT and FTT improvement.
>  
> Thus it could be a mission of ~10 days at jlab, with work in hall B.
> It could be from ~21 to ~31 January.
> The team could be composed of: Physicist, detector expert, PLC expert, DAQ expert: around ~ 5 of us.
>  
> Hera are some details about each topic
>  
> BoNuS12
> For us one of the goal of this meeting is to define the what/who/how/when work on MVT, knowing that part of MVT  is used by BoNuS12
> We will work ahead to come with procedure addressing the following points:
> -how to partially dismount MVT, 
> -how to store it,
> -how to remount it,
> - with all requirements regarding the tooling, the risks and the corresponding interventions.
> Like you propose ,we indeed need email and/or bluejeans exchange(s) to have something to work with altogether in January.
>  
>  
> MVT
> After improving the MVT vs cold , we would like to improve the gas distribution.
> Several items:
> ·       Gas output: how to avoid gas stop when wind gets to high (wind gust). Bob tested different solutions but the flow in thin curved detector is so small that we remain very sensitive to wind gust.
> ·       Lower the gas humidity: the uses of plastic line from cart to detector bring humidity inside the detector itself (checked also here in Saclay on other experiments). This is an issue especially considering the cold temperature at which MVT is now operating (possible condensation inside the detector itself). Two solutions foreseen
> o   Use of metallic lines: expensive and mechanically difficult to implement in crowded space  
> o   Use of dry air around plastic line (Bob idea !): this could be very efficient and simple to implement. We will draw some possibility to exchange with you Bob.
> ·       Increase the gas flow of BMT (have higher and uniform efficiency). Actually the 3 detectors of a same layer are fed in serial, resulting in more loss of charge and low flow since we cannot accommodate for "high pressure" in the first detector. We propose to pass the gas in parallel of 3 detectors in each layer without modification of the gas rack. We would have on our tube near FEU racks two small volume for each layer to divide/group the flow in parallel for 3 detectors. It’s a small hardware modification with standard gas equipment. This would not change the safety of detectors ( i.e.  flammable gas safety, pressure safety since flow and leaks are still controlled/recorded by a unchanged gas distribution rack + PLC controller).
> ·       Thinking ahead on HPS implementation: when cart+SVT+MVT will be removed we want MVT to be in N2 when resting in hall B. For this we need to feed N2 (~12 l/h) through our gas rack on cart (avoid high pressure). Then a ~ small PLC cable could be made this spring and PLC (only the Barrel one) brought close to Cart = safe N2 flow. This HPS topic could be made with a  ½ day brainstorm meeting with Bob and Yuri.
>  
> We would need a few days (~5) to upgrade and test MVT gas  improvement.
>  
> Mail FTT
> Regarding FTT, we havea  few things to do:
> ·       Change the optical fiber connection (FO) between FEU and BEU: Potentially interesting for MesonEx group, It would also be an opportunity to improve the current mapping (cables have been inverted and/or badly connected to the FEU... a real nightmare).
> ·       to consider moving away FEU crates from the beam: the few DAQ incident related to FTT are most likely caused by radiation exposure.
> For mapping and FO change including the corresponding tests of such modification, we would need ~ 2 days with access to FTT (up there safe).
>  
> Cheers
>  
> Stephan for MVT team
>  
> De : burkert <burkert at jlab.org <mailto:burkert at jlab.org>> 
> Envoyé : samedi 3 novembre 2018 20:15
> À : Aune Stephan <stephan.aune at cea.fr <mailto:stephan.aune at cea.fr>>; skuhn at odu.edu <mailto:skuhn at odu.edu>
> Cc : SABATIE Franck <Franck.Sabatie at cea.fr <mailto:Franck.Sabatie at cea.fr>>; DEFURNE Maxime <Maxime.Defurne at cea.fr <mailto:Maxime.Defurne at cea.fr>>; MANDJAVIDZE Irakli <irakli.mandjavidze at cea.fr <mailto:irakli.mandjavidze at cea.fr>>; rmiller <rmiller at jlab.org <mailto:rmiller at jlab.org>>
> Objet : Re: Bonus and MVT interaction
>  
> Dear Stephan and all,
> 
> Thank you for your communications. It is of course critical to define the project in detail with all interested parties involved. The remainder of this year is not a good period as we are still running until December 19. However, from our (JLab) side the period in the month of January might be a good time to have such a meeting at JLab. Another possibility would be early summer. I think such a meeting would be preferable over email exchanges. Of course, we should have communications before such a meeting, e.g. via BlueJeans video conferencing, to ensure all relevant aspects will be considered once we meet in persons.   
> 
> What do you think about this? 
> 
> By the way, the installation of the BoNuS12 detector/removal of MVT is now shifted to the beginning of year 2020 due to delays of the accelerator operation and the extension of the current run period into 2019. The latter shifts the end of the fall run 2019 until just before the Xmas break.  This leaves about 6 weeks of installation time in January through February 12, 2020 when the BoNuS12 experiment is scheduled to start. 
> 
> The updated schedule will be send out shortly by management. 
> 
> Best regards, 
> Volker
> 
>    
> 
> 
>  On 10/30/18 10:41 AM, Aune Stephan wrote:
> Dear Sebastian and Volker
>  
> The time when Bonus experiment will be in place is getting closer, i.e. ~ 1 year.
>  
> The Bonus installation requires the dismounting of MVT and the use of MVT electronic and part of its mechanics. Thus interaction between our teams. The dismounting and remounting of MVT for Bonus is not a task without risk for our tracker. 
>  
> We have asked you more than a year ago an official request for this operation with the definition of responsibilities, planning, and definition of who does what. A sort of letter of intent to organize ourselves.
> Something short and simple that would allow us to organize ourselves together.
>  
> Up to now we have received nothing official from you, nor from Jlab, for this Bonus installation versus MVT.
>  
> I wish we could have this fall thing clarified between us, Jlab, ODU and CEA. Then we could move forward.
>  
> We will modify the Firmware of the Front End Unit, FEU, for Bonus purpose
>  
> The firmware of the Back End Units, BEU, must be modified, but we will not do this task.
>  
> The CODA software must be changed as well, and we will participate only very partially to this task.
>  
> Also we are considering the idea of leaving Hitachi cables in place for Bonus, this would imply the dismounting of MVT barrel detector to disconnect them. The fact that we have dismounted detectors this summer to improve MVT versus cooling of SVT makes us think it is possible. But it mean the presence of MVT expert to do so and presence also for remounting and testing MVT after Bonus.
> Leaving the Hitachi cables will save money for Bonus, but will require more CEA Saclay staff presence at jlab.
>  
> Before engaging ourselves forward we need from you, ODU and Jlab, a clarification on your objectives.
>  
> Cheers
> Stephan for MVT team.
>  
>  
>  

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