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Re: Comments on slides
Hall D PID Mail List:
Hi,
It is probably a bit late but by going over your talk, Tim, I noticed the
use of SI units (kg,cm) and English units (lbs., inch) together. Sometimes
you give a conversion other times not. In general, should we not decide to
use one kind of units (SI)?
Cheers,
Yves
/--------------------------------
/ Yves Van Haarlem
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On Tue, 25 Mar 2008, Tim Whitlatch wrote:
> 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 *
>> * *
>> **********************************************************************
>>
>>
>>
>>