[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Comments on slides
On Tue, 25 Mar 2008, Tim Whitlatch wrote:
Dear Tim,
I think a very nice talk.
I will not give comments on the spelling, they would never be as complete
as Dan's so here some small additional remarks.
slide 8: the inner skin arrow points to a funny place
slide 9: why do we need 50 micron precission on the holes
slide 12: some infor on the gas tight connector is not readable
slide 18: question to both cdc and fdc what is the tolerable leak rate for
the chambers.
slide 22: why are the field wires under more tension than the sense wires
cheers elke
> Date: Tue, 25 Mar 2008 17:07:39 -0400
> From: Tim Whitlatch <whitey@jlab.org>
> To: Daniel S. Carman <carman@jlab.org>
> Cc: halld-pid@jlab.org, FDC email list <halld-tracking-hw@jlab.org>
> Subject: Re: Comments on slides
>
> Dear Dan,
>
> Thank you very much for taking a close look at all my slides. I have
> addressed many of your comments and have reposted.
>
> I do not intend to show any slides on the cable attach inside the BCAL.
> Chucks picture is a cartoon for now. I did plan on mentioning some sort
> of attachment on the maintenance slide.
>
> Also, I do not plan on getting into details on the magnetic field quench
> during the talk. I will mention we are looking into it and have some
> preliminary calculations.
>
> The lower figure on slide 24 is a section cut from the area circled.
>
> Thanks again.
>
> Tim
>
> Daniel S. Carman wrote:
> > Tim,
> >
> > Things are looking better and better in your talk. I have gone
> > over the slides and my comments are below. Let me know if you
> > have any questions.
> >
> >
> > Regards,
> >
> > Daniel
> >
> > **********************************************************************
> > pp.8 : Meaning of Phi=119.5cm in upper-left corner?
> >
> > pp.10 : Make figure slightly smaller to separate it from bullets. This
> > is a problem on several slides in your talk. Note that 20 micron
> > is wire diameter.
> >
> > pp.12 : Labels overlap figure. Make it slightly smaller to separate
> > from bullets.
> >
> > pp.14 : For the text in the lower right, make it span 2 lines to avoid
> > overlap with the slide number.
> >
> > pp.16 : eliminate punctuation on 4th bullet for consistency.
> >
> > Note: leaks are not the real problem (for a non-flammable gas mixture).
> > The issue is contamination of the gas from water and oxygen. In
> > general, if things can get from the inside to the outside, they
> > can surely get from the outside to the inside!
> >
> > pp.19 : Missing ")" on 2nd bullet. Note that FDC assembled as single
> > structure for installation. Note that 118 cm diameter is too
> > small. This is the O.D. of the frame and does not account for
> > the cabling.
> >
> > Note: You have not mentioned anything about the FDC cable support
> > inside the solenoid (outside the BCAL). Is the current plan
> > too premature/underdeveloped for at least a mention? Chuck
> > has a picture that I included in the FDC TDR.
> >
> > pp.20 : On 3rd bullet, use "o-ring grooves".
> >
> > pp.21 : The wording "structural skin" is unneccesarily repeated repeated.
> >
> > pp.22 : Again, 20 microns and 80 microns are wire diameters. Use the
> > term "sense wire" and not "signal wire". Also note that the
> > tension choices for the W and CuBe wire are chosen to match the
> > gravitational sag.
> >
> > pp.24 : Fig. labels overlap bullets. Also the lower figure does not
> > make sense to me. It looks like we have square frames. It
> > might be worth mentioning that tubes/skins will be light-weight.
> > Skins will not allow for current path in case of a magnet
> > quench.
> >
> > pp.26 : The point of this slide is not clear. This model is being made
> > and calculations carried out to determine the hole locations and
> > sizes to ensure a uniform gas mixture and (semi-) rapid gas
> > volume exchange. It is crucial to have no pockets of stagnant
> > gas. Also note that the holes in the cathodes rotate from
> > cathode layer to cathode layer.
> >
> > pp.27 : Labels overlap bullets.
> >
> > pp.28 : Move slide contents further below the title.
> >
> > pp.29 : Note that wire frame boards are only partially stuffed prior to
> > wire stringing. Additional components (including the connectors)
> > are added after stringing.
> >
> > pp.32 : FDC installed from the upstream end should be stated explicitly.
> >
> > pp.33 : All bullet for why we extract from downstream end for servicing.
> > The point is not to disturb the CDC, target, start counter,
> > beamline, etc. (or their alignment). Also note that the first
> > step in downstream extraction is to move the downstream carriage
> > downstream and then to install the service platform.
> >
> > pp.34 : Spurious "[" on first bullet. Also I do not know what you are
> > saying in the 2nd bullet.
> >
> > pp.36 : Meaning of 2nd bullet unclear. Also statement on minimizing
> > material in the active area is unclear. The bars themselves
> > are in the active area.
> >
> > pp.37 : On 3rd bullet, use 252 cm**2 (i.e. superscript) active area.
> > On 4th bullet, use "6 cm" not "6cm".
> > On 5th bullet, use "readout" not "read".
> > On 6th bullet, is hole 12 cm**2?
> >
> > pp.38 : Fig. labels overlap words.
> >
> > pp.40 : Missing your footer here. Also you have not mentioned the
> > movement of the downstream carriage.
> >
> > pp.41 : Slide is incomplete. State what has been done to address this
> > issue in the FDC, CDC, and TOF. Mention Al endplate for CDC.
> > Ref. Elton's GlueX note and give some relevant scale for the
> > forces involved. In other words, beef this slide up a bit.
> >
> > pp.43 : Note that this is an example for one subsystem (the FDC) and
> > that this hazard analysis has been done for all Hall D/GlueX
> > subsystems and the Hall itself.
> >
> > pp.44 : On 3rd bullet, I would say "Some details still need to be ironed
> > out".
> > On 5th bullet, why not say "personnel and equipment safety".
> > We are designed the detector and all construction/installation
> > procedures certainly to protect the workers, but a big part of
> > the design is also to protect the system (our investment) in
> > case of failures or problems.
> > **********************************************************************
> > **********************************************************************
> > * *
> > * Dr. Daniel S. Carman e-mail : carman@jlab.org *
> > * Staff Scientist office : (757)-269-5586 *
> > * Jefferson Laboratory web: www.jlab.org/~carman *
> > * *
> > **********************************************************************
> >
> >
> >
> >
>
( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
) `\ -
/ '. | +
| `, 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 -
+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+
begin:vcard
fn:Timothy Whitlatch, PE
n:Whitlatch;Timothy
tel;work:757-269-5087
tel;fax:757-269-5279
version:2.1
end:vcard