[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: A few questions (fwd)




HI Elke,

You can find Richard's transparencies presented at the Photon Beam and
Tagger Review at

http://clasweb.jlab.org/elton/halld/beamTaggerSim.ppt

They contain backup information on what is included in the background/rate
simulations for the detector. They might be useful if we need to make them
available.

Cheers, Elton.




Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625

On Wed, 7 Mar 2007, David Lawrence wrote:

>
> OK. Here is the revised document.
>
> Regards,
> -David
>
> Elke-Caroline Aschenauer wrote:
> > On Wed, 7 Mar 2007, David Lawrence wrote:
> >
> > Dear David,
> >
> > here the corrections from will looking to the document.
> >
> > Document misspells bremsstrahlung in line 1.
> > Suggest replace "simulation current" with "simulated version of January
> > 15" to avoid confusion with beam current.
> > Suggest you boldface or italicize "all processes turned on", which I
> > think is the main answer. A more complete answer will include a list of
> > the 'cuts' in GEANT3.
> > Page 2 replace "collimato" with "collimator"
> > Page 3 add period at end of sentence, separate unit from number, e.g.,
> > "20cm"-> "20 cm" in 2 places.
> >
> > thanks for implementing them
> >
> > cheers elke
> >
> >
> >
> >> Date: Wed, 07 Mar 2007 13:50:24 -0500
> >> From: David Lawrence <davidl@jlab.org>
> >> To: Elton Smith <elton@jlab.org>
> >> Cc: Elke-Caroline Aschenauer <elke@jlab.org>,
> >> cmeyer@ernest.phys.cmu.edu,
> >>      halld-tracking-hw@jlab.org, dzierba@indiana.edu
> >> Subject: Re: A few questions (fwd)
> >>
> >>
> >> Hi Elton,
> >>
> >>     I have included this comment in the captions of the last two
> >> figures. Here is the latest version of the response to question 1.
> >>
> >> Regards,
> >> -David
> >>
> >> Elton Smith wrote:
> >> > HI Elke,
> >> >
> >> > One note on the rates which we should add, is that the 600 KHz in
> >> the FDC
> >> > downstream chambers corresponds to 0.6 deg (this assumes the same dead
> >> > region all through the drift chambers. The rate for 1 degree
> >> openning is
> >> > closer to 150 KHz maximum or a 5% aperture.
> >> >
> >> > This might be a number whis is useful to quote in answering the first
> >> > question.
> >> >
> >> > Cheers, Elton.
> >> >
> >> >
> >> >
> >> >
> >> > Elton Smith
> >> > Jefferson Lab MS 12H5
> >> > 12000 Jefferson Ave
> >> > Suite # 16
> >> > Newport News, VA 23606
> >> > elton@jlab.org
> >> > (757) 269-7625
> >> >
> >> > On Wed, 7 Mar 2007, Elke-Caroline Aschenauer wrote:
> >> >
> >> >
> >> >> Dear all,
> >> >>
> >> >> we have to find answers to this questions I suggest we discuss
> >> them in the
> >> >> coffee break.
> >> >> Dan I print you document on the costing of the fdc to give it to
> >> them,
> >> >> that should answer definetely all on it for the fdc, Curtis can we
> >> give
> >> >> them what you gave in former times and lately to elton to be
> >> included in
> >> >> the costbook.
> >> >>
> >> >> For the rest I guess it should be not very difficult to find answers.
> >> >>
> >> >> Regards
> >> >> elke
> >> >>
> >> >>
> >> >>
> >> >>  ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> >> >>   )    `\                                                  -
> >> >>  /    '. |                                                  +
> >> >>  |       `,              Elke-Caroline Aschenauer            =
> >> >>   \,_  `-/                                                    -
> >> >>   ,&&&&&V         Jefferson Lab                                +
> >> >>  ,&&&&&&&&:       HALL-D 12C / F381       121-A Atlantic Avenue =
> >> >> ,&&&&&&&&&&;      Mailstop: 12H5          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.:
> >> 001-757-269-6248                              -
> >> >>
> >> +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+
> >> >>
> >> >> ---------- Forwarded message ----------
> >> >> Date: Wed, 07 Mar 2007 08:02:21 -0600
> >> >> From: David Christian <dcc@fnal.gov>
> >> >> To: elke@jlab.org
> >> >> Cc: David Christian <dcc@fnal.gov>, brooksw@jlab.org,
> >> whitlock@jlab.org
> >> >> Subject: A few questions
> >> >>
> >> >> Dear Elke,
> >> >>
> >> >> After yesterday's session, we have a few questions the answers to
> >> which
> >> >> would help us as we consider what to write in a report.  I would
> >> >> appreciate it if you could respond today:
> >> >>
> >> >> 1) What calculation/simulation has been done of the background
> >> processes
> >> >> that will dominate the rate in the chambers?
> >> >>
> >> >> 2) It appears that the minimum allowable straw radius is set by a
> >> >> maximum allowable rate that is calculated assuming that a dE/dx
> >> >> measurement needs to be made in these straws.  Is this correct?
> >> If not,
> >> >> how was the maximum allowable rate estimated?
> >> >>
> >> >> 3) Do you have supporting material available for the cost estimates?
> >> >>
> >> >> 4) Since the configuration of magnet steel is being changed, we are
> >> >> somewhat concerned with the fact that you do not plan to map the
> >> field.
> >> >>   What drove this decision?
> >> >>
> >> >> Sincerely,
> >> >> David Christian
> >> >>
> >> >>
> >> >>
> >> >>
> >> >
> >> >
> >>
> >> --
> >>
> >> ------------------------------------------------------------------------
> >>   David Lawrence Ph.D.
> >>   Staff Scientist                 Office: (757)269-5567   [[[  [   [ [
> >>   Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [
> >>   http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
> >> ------------------------------------------------------------------------
> >>
> >>
> >>
> >
> > ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> >  )    `\                                                  -
> > /    '. |                                                  +
> > |       `,              Elke-Caroline Aschenauer            =
> >  \,_  `-/                                                    -
> >  ,&&&&&V         Jefferson Lab                                +
> > ,&&&&&&&&:       HALL-D 12C / F381       121-A Atlantic Avenue =
> > ,&&&&&&&&&&;      Mailstop: 12H5          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.:  001-757-269-6248                              -
> >            +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+
> >
>
> --
>
> ------------------------------------------------------------------------
>   David Lawrence Ph.D.
>   Staff Scientist                 Office: (757)269-5567   [[[  [   [ [
>   Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [
>   http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
> ------------------------------------------------------------------------
>
>
>