[PRad] draft presentation

Eugene Pasyuk pasyuk at jlab.org
Wed Mar 23 23:50:55 EDT 2016 

Done.

-Eugene

----- Original Message -----
> From: "Kondo Gnanvo" <kg6cq at eservices.virginia.edu>
> To: "Eugene Pasyuk" <pasyuk at jlab.org>, "Ashot Gasparian" <gasparan at jlab.org>
> Cc: "prad" <prad at jlab.org>
> Sent: Wednesday, March 23, 2016 11:40:56 PM
> Subject: RE: draft presentation

> Hi Eugene,
> Sorry for the late submission.
> Please see the new version of my presentation.
> You could upload this one
> 
> Thanks
> Kondo
> ________________________________________
> From: PRad [prad-bounces at jlab.org] on behalf of Eugene Pasyuk [pasyuk at jlab.org]
> Sent: Wednesday, March 23, 2016 9:46 PM
> To: Ashot Gasparian
> Cc: prad
> Subject: Re: [PRad] draft presentation
> 
> Ok. I'll make change in the agenda.
> 
> -Eugene
> 
> ----- Original Message -----
>> From: "Ashot Gasparian" <gasparan at jlab.org>
>> To: "Eugene Pasyuk" <pasyuk at jlab.org>
>> Cc: "Ashot Gasparian" <gasparan at jlab.org>, "prad" <prad at jlab.org>
>> Sent: Wednesday, March 23, 2016 9:43:45 PM
>> Subject: Re: [PRad] draft presentation
> 
>> Eugene,
>>
>> The part "expected results" should not be in my talk, Haiyan is covering
>> that part.
>> That is good enough.
>>
>> Ashot
>>
>>
>>> I think the transporter will allow control on the millimeter level.
>>> Why would it move from the position if the motors are not moving?? Are you
>>> expecting an earthquake? We will have to disconnect and lock/tag power for
>>> the motor drivers once it is in position before we attach the pipe to the
>>> window. This is very important! If it moves, it breaks the window.
>>> We still have time to think about it and may be check with Dave Kashy who
>>> designed it.
>>>
>>> On the other subject. I think it would be good if you put direct answers
>>> to appropriate items from the report. The items are listed on the agenda
>>> next to your talk.
>>>
>>> -Eugene
>>>
>>> ----- Original Message -----
>>>> From: "Ashot Gasparian" <gasparan at jlab.org>
>>>> To: "Eugene Pasyuk" <pasyuk at jlab.org>
>>>> Cc: "Ashot Gasparian" <gasparan at jlab.org>, "prad" <prad at jlab.org>
>>>> Sent: Wednesday, March 23, 2016 7:39:31 PM
>>>> Subject: Re: [PRad] draft presentation
>>>
>>>> If we can position the HyCal in the beam with a +/- 1. mm
>>>> accuracy without taking it from the Transporter then we can
>>>> go with that option. There is one more question on this way:
>>>> how we are going to keep that alignment for 3 days?
>>>> If it is also possible then we go with that option.
>>>>
>>>> Ashot
>>>>
>>>>
>>>>>
>>>>>
>>>>> -Eugene
>>>>>
>>>>> ----- Original Message -----
>>>>>> From: "Ashot Gasparian" <gasparan at jlab.org>
>>>>>> To: "Eugene Pasyuk" <pasyuk at jlab.org>
>>>>>> Cc: "Ashot Gasparian" <gasparan at jlab.org>, "prad" <prad at jlab.org>
>>>>>> Sent: Wednesday, March 23, 2016 5:59:18 PM
>>>>>> Subject: Re: [PRad] draft presentation
>>>>>
>>>>>> Okay, there is still the HyCal question open to me. I agree that we
>>>>>> can
>>>>>> survey GEMs
>>>>>> vs. HyCal when HyCal is on the Transporter. But, we can not position
>>>>>> and
>>>>>> survey the
>>>>>> HyCal in the beam position without taking it off from the Transporter.
>>>>>> I am not sure how we can position HyCal on the beam without surveying
>>>>>> it.
>>>>>> Also, it
>>>>>> needs to be fixed in the beam position.
>>>>>> I tend to go with a ~4 hours of technicians work but have a provided
>>>>>> measurements.
>>>>>>
>>>>>
>>>>> We always can survey HyCal in Hall coordinates. The alignment is
>>>>> another
>>>>> story. Yes, we won't be able to do fine tuning (pitch/yaw/roll and Z
>>>>> translation). But we still can do X and Y translation using transporter
>>>>> to
>>>>> align hycal face centered on the geometrical beam axis. Survey guys can
>>>>> tell us how much up/down left/right to move. And they can tell tell us
>>>>> pitch/yaw/roll angles. We won't be able to adjust them but we will know
>>>>> them. My claim that for the short test run since HyCal is not
>>>>> calibrated
>>>>> anyways these angles are not very important if they are not 0. We will
>>>>> have to redo all the alignment procedures in May. For the test run the
>>>>> goal is to learn how to do that. THe other goal is to see that all the
>>>>> electronics and DAQ works as we want it.
>>>>>
>>>>>> Please comment on this.
>>>>>>
>>>>>> Also, can you put together those items for the Target sell alignment
>>>>>> procedure?
>>>>>
>>>>> I can try to write it up but I need some numbers from Chris: horizontal
>>>>> and distances to the edges of the quadrants.
>>>>>
>>>>>> Thanks,
>>>>>> Ashot
>>>>>>
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> -Eugene
>>>>>>>
>>>>>>> ----- Original Message -----
>>>>>>>> From: "Ashot Gasparian" <gasparan at jlab.org>
>>>>>>>> To: "Eugene Pasyuk" <pasyuk at jlab.org>
>>>>>>>> Cc: "Ashot Gasparian" <gasparan at jlab.org>, "prad" <prad at jlab.org>
>>>>>>>> Sent: Wednesday, March 23, 2016 5:10:39 PM
>>>>>>>> Subject: Re: [PRad] draft presentation
>>>>>>>
>>>>>>>> Eugene,
>>>>>>>>
>>>>>>>> Here are some discussions:
>>>>>>>> 1) If we keep HyCal on the transporter we can not put accurately
>>>>>>>>    enough in the beam and survey it (with the GEM).
>>>>>>>
>>>>>>> Here are my thoughts why.
>>>>>>> GEM can be surveyed relative to HyCal regardless of whether it is on
>>>>>>> the
>>>>>>> cart or on the transporter.
>>>>>>> I agree that when HyCal is on the transporter we don't have Z-degree
>>>>>>> of
>>>>>>> freedom. But for the test run it is not very important. If we put it
>>>>>>> on
>>>>>>> the cart now, we will have to put it back on the transporter for
>>>>>>> calibration in May and then back to the cart. This will save time and
>>>>>>> efforts.
>>>>>>>
>>>>>>>> 2) We need to protect the rest of the setup while accelerator is
>>>>>>>>    tuning the beam. The "Beam block" is in between two collimators.
>>>>>>>>    We have done that in past many times. Are you referring to legal
>>>>>>>>    terminology (safety) or a technical possibility?
>>>>>>>
>>>>>>> It's terminological. Also there is empty space between the
>>>>>>> collimator.
>>>>>>> To
>>>>>>> block the beam we would need to move collimator by an inch or so from
>>>>>>> the
>>>>>>> nominal position. You want protection from tagger magnet trip. There
>>>>>>> is
>>>>>>> an
>>>>>>> FSD interlock for that, machine shuts down if magnet trips.
>>>>>>>
>>>>>>>> 3)for the "dropping 1(bcdf) items, I do not see a connection with
>>>>>>>> HyCal
>>>>>>>>   being in the beam. I think we need to see the quality of the
>>>>>>>> e-beam
>>>>>>>>   by scanning it with the upstream harp. Are you questioning the
>>>>>>>>   detection part of the harp?
>>>>>>>
>>>>>>> No, we will do harp studies. These items are about photon radiator
>>>>>>> which
>>>>>>> we do not need. We can leave for the very end if we have time.
>>>>>>>
>>>>>>>> 4) for the part 2(lmn), yes it is utilizing the additional foils
>>>>>>>> with
>>>>>>>>    quadrants. Do you want to change the wording?
>>>>>>>
>>>>>>> It is not just change of wording, it is a bit different procedure. We
>>>>>>> have
>>>>>>> a rough idea but we need to spell it out step by step.
>>>>>>>
>>>>>>>> 5) yes, I will add the GEM timing part.
>>>>>>>>
>>>>>>>> Please comment, the HyCal in the beam is important question.
>>>>>>>>
>>>>>>>> Ashot
>>>>>>>>
>>>>>>>>> Some comments on the Run Plan.
>>>>>>>>>
>>>>>>>>> We should keep HyCal on the transporter for the test run.
>>>>>>>>>
>>>>>>>>> 1. There is no "Beam block" position for the collimator. We should
>>>>>>>>> use
>>>>>>>>> FSD
>>>>>>>>> interlock with tagger magnet power supply.
>>>>>>>>>
>>>>>>>>> Drop 1(b,c,d,f) It is pointless because HyCal will not be in the
>>>>>>>>> beam.
>>>>>>>>>
>>>>>>>>> Cell alignment procedure 2(l,m,n) should be changed to utilize
>>>>>>>>> additional
>>>>>>>>> foils with quadrants.
>>>>>>>>>
>>>>>>>>> Add GEM trigger delay adjustment.
>>>>>>>>>
>>>>>>>>> -Eugene
>>>>>>>>>
>>>>>>>>> ----- Original Message -----
>>>>>>>>>> From: "Ashot Gasparian" <gasparan at jlab.org>
>>>>>>>>>> To: "prad" <prad at jlab.org>
>>>>>>>>>> Sent: Wednesday, March 23, 2016 4:09:15 PM
>>>>>>>>>> Subject: [PRad] draft presentation
>>>>>>>>>
>>>>>>>>>> Hi All,
>>>>>>>>>>
>>>>>>>>>> The draft of my presentation is attached. I am still working on
>>>>>>>>>> the
>>>>>>>>>> formating
>>>>>>>>>> part so, please check the information and the numbers for now.
>>>>>>>>>>
>>>>>>>>>> Kondo, please check the "GEM Requirement" slides and let me know
>>>>>>>>>> if
>>>>>>>>>> some
>>>>>>>>>> numbers need to be corrected.
>>>>>>>>>>
>>>>>>>>>> Thank you,
>>>>>>>>>> Ashot
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> PRad mailing list
>>>>>>>>>> PRad at jlab.org
>>>>>>>>>> https://mailman.jlab.org/mailman/listinfo/prad
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