[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Talk 2: v3
Hall D PID Mail List:
Hi Elke -
On Sun March 23 2008, Elke-Caroline Aschenauer wrote:
> On Sat, 22 Mar 2008, Yves Van Haarlem wrote:
>
> Dear Yves,
>
> I have some small remarks still to your slides.
>
> slide 4:
> I don't think it is true it is mainly protons which go to the CDC.
>
> it is not clear to me what the points path length and energy deposition
> should indicate. if you want to say that that is what is measured, than
> that is really obvious if I do dE/dx ;)
>
> the 3rd item Need:
> hm, this numbers really fall from heaven here, they have especially no
> relation to anything before.
> Especially the sigma_z is difficult, because i think we show not one plots
> which proofs that we reach this and what it does on the physics.
> I would also rename it to performance Goals. Actaully the whole slide is
> better titled like that.
>
sadly, we also have to look at the history of what DOE and JLab has done to us
by dragging out this project as long as it has been. The reality is that when we started
with all of this eight years ago, for a finite budget and what we felt that we could do at
CMU, these were perfectly reasonable comparisons. A 1.5cm think Al endplate of the
area that we talked about for the CDC would be needed to support the 5000kg load.
The project moved forward with R&D in this regard. Now here we are 8 years later.
If I look at PANDA, they are going with 150cm long straws for the same
purpose as us, their so-called straw-tube tracker. Though from the numbers
posted on their web site, it is difficult to tell what the actual dimensions are,
other than they claim 150micron position resoultion (r-phi) and 1mm z from
stereo. They base this design on a WASA design (also straw tubes).
-- Curtis
> slide 6:
> I think that remark is more for curtis, crystal Barrel was a nice
> experiment, but like E852 stopped data taking last century ;) Is this
> really the best comparision to make.
> How about to look here http://www-panda.gsi.de/auto/_home.htm
> and the wasa experience.
>
> slide 19, I still think this slide is slightly misplaced, either it should
> go infront of the safety slide or actually to the prototype, because there
> you use it.
>
>
> cheers elke
>
>
>
>
>
> > Date: Sat, 22 Mar 2008 00:10:00 -0400 (EDT)
> > From: Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>
> > To: halld-pid@jlab.org, GlueX Tracking <halld-tracking-hw@jlab.org>
> > Subject: Talk 2: v3
> >
> > Hall D PID Mail List:
> >
> > Hi All,
> >
> > While students are playing capture the flag and singing songs in the
> > building I prepared version 3 of talk 2. It can be found on the usual wiki
> > page and is waiting for your comments.
> >
> > Plots that I do not have but were requested during the dry run:
> >
> > 1 - Radiation length plot for a 90 and a 20 degree track (for slide 6)
> > 2 - dE/dx plot with no correction for distance, I was told this plot
> > already exists (for slide 27)
> >
> > David could you provide a link to these plots?
> >
> > Thanks!
> >
> >
> > Cheers,
> > Yves
> >
> >
> > ps. You can also use this link:
> > http://www-meg.phys.cmu.edu/~yvhaarle/cdctalk.pdf
> >
> >
> > /--------------------------------
> > / Yves Van Haarlem
> > _--~~--_ /
> > /~/_| |_\~\ / Carnegie Mellon University
> > |____________| / Department of Physics
> > |[][][][][][]|:= / Wean Hall room 8404
> > __| __ |__ \ Pittsburgh, PA 15213
> > | ||. | == | | \ USA
> > (| ||__| == | |) \
> > | |[] [] == | | \ Tel.: +1 412 268-6949
> > | |____________| | \ +1 412 641-9252
> > /__\ /__\ \ Fax.: +1 412 681-0648
> > ~~ ~~ \-----------------------------------
> >
> > On Wed, 19 Mar 2008, Yves Van Haarlem wrote:
> >
> > > Hi All,
> > >
> > > The updated version of talk 2 is now available on the wiki page:
> > >
> > > http://www.jlab.org/Hall-D/software/wiki/index.php/DC_and_PID_Review
> > >
> > >
> > > Cheers,
> > > Yves
> > >
> > > /--------------------------------
> > > / Yves Van Haarlem
> > > _--~~--_ /
> > > /~/_| |_\~\ / Carnegie Mellon University
> > > |____________| / Department of Physics
> > > |[][][][][][]|:= / Wean Hall room 8404
> > > __| __ |__ \ Pittsburgh, PA 15213
> > > | ||. | == | | \ USA
> > > (| ||__| == | |) \
> > > | |[] [] == | | \ Tel.: +1 412 268-6949
> > > | |____________| | \ +1 412 641-9252
> > > /__\ /__\ \ Fax.: +1 412 681-0648
> > > ~~ ~~ \-----------------------------------
> > >
> >
>
> ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> ) `\ -
> / '. | +
> | `, Elke-Caroline Aschenauer =
> \,_ `-/ -
> ,&&&&&V Jefferson Lab +
> ,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
> ,&&&&&&&&&&; Suite 8 Hampton, VA 23664 -
> | |&&&&&&&;\ 12000 Jefferson Ave +
> | | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
> | | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
> '--' `-.--. | +
> \_ | |---' Tel.: 001-757-269-5352 =
> `-._\__/ Fax.: 001-757-269-6331 -
> +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+
>
--
Professor Curtis A. Meyer Department of Physics
Phone: (412) 268-2745 Carnegie Mellon University
Fax: (412) 681-0648 Pittsburgh PA 15213-3890
cmeyer@ernest.phys.cmu.edu http://www.curtismeyer.com/
- References:
- Talk 2: v3
- From: Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>
- Re: Talk 2: v3
- From: Elke-Caroline Aschenauer <elke@jlab.org>