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Re: [Star-fst-l] beam pipe radius

From: Zhenyu Ye <yezhenyu2003 AT gmail.com>
To: "Sharma, Rahul" <rsharma AT bnl.gov>
Cc: "star-fst-l AT lists.bnl.gov" <star-fst-l AT lists.bnl.gov>
Subject: Re: [Star-fst-l] beam pipe radius
Date: Tue, 14 May 2019 13:22:12 -0500

Thanks, Rahul. How about 4.9 cm? This way there is a 0.75 cm clearance and we
don’t need to change the Silicon sensor layout.

Zhenyu

> On May 14, 2019, at 12:15 PM, Sharma, Rahul <rsharma AT bnl.gov> wrote:
>
> Hi Yi,
>
> Beampipe diameter is 3inches+0.25 inches for wrapping + thermocouples. This
> converts to 8.25cm. We need to keep in mind that the IDS and Beam pipe are
> not concentric and we need some clearance all around so that we are not
> scraping on thermocouple cables etc. when we slide the detector in. That's
> why we gave you 10cm number which would have given us close to 8.5mm
> clearance all around the beam pipe. It is already pretty tight as we have
> alot of unknowns.
>
> By making the radius 4.75cm, you are reducing the clearance to 6mm. I don't
> think it will work.
>
> • Rahul
>
> From: Yi Yang <yiyang AT ncku.edu.tw>
> Sent: Monday, May 13, 2019 11:05 PM
> To: Zhenyu Ye
> Cc: Sharma, Rahul; Aschenauer, Elke; star-fst-l AT lists.bnl.gov
> Subject: Re: [Star-fst-l] beam pipe radius
>
> Hi Rahul,
>
> Could you please confirm if 4.75 cm is good for the inner radius of the
> forward silicon tracker?
> Thanks a lot.
>
> Cheers,
> Yi
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> Yi Yang, Assistant Professor
> Department of Physics
> National Cheng Kung University
> Tainan, 701 Taiwan
> E-Mail: yiyang AT ncku.edu.tw
> Tel: +886-6-2757575 ext.65237
> Fax: +886-6-2747995
> Group Web:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=dlIVkpYOa2ADoHT3V4qjuhdQOnpLdNdrAb1-4i7stYw&s=xWZdx544jJIxdirIJZLsJNNHbPDNkeG_D0hWp_ADDQM&e=
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> On Fri, May 10, 2019 at 9:58 AM Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:
> Hi Rahul,
>
> Would it be ok if the Silicon disks have an inner radius of 4.75 cm? What
> is the clearance in this case?
>
> Thanks,
> Zhenyu
>
>
> > On May 9, 2019, at 8:31 AM, Sharma, Rahul <rsharma AT bnl.gov> wrote:
> >
> > Hi Yi,
> > Yes that is including the wrapping and thermocouple cables that have to
> > be left on place around beampipe. It also includes the clearance we need
> > to make the mechanism of discs sliding around the beampipe work.
> >
> > • Rahul
> >
> > From: Yi Yang <yiyang AT ncku.edu.tw>
> > Sent: Wednesday, May 08, 2019 6:06 PM
> > To: Aschenauer, Elke <elke AT bnl.gov>
> > Cc: Christie, William <christie AT bnl.gov>; Sharma, Rahul
> > <rsharma AT bnl.gov>; star-fst-l AT lists.bnl.gov
> > Subject: Re: [Star-fst-l] beam pipe radius
> >
> > Dear Elke,
> >
> > Gerard just mentioned to me that I misread the drawing.
> > The radius of the beryllium tube is 1.5 inches (3.810 cm).
> >
> > Zhenyu and I remember that Rahul mentioned the radius of the beam pipe is
> > about 5 cm, so I believe this number included all the wrapping stuff I
> > mentioned.
> >
> > To simplify my question to Rahul: is it okay if the inner radius of the
> > silicon tracker is 4.75 cm (1.87 inches)?
> >
> > Cheers,
> > Yi
> >
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Assistant Professor
> > Department of Physics
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web:
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=dlIVkpYOa2ADoHT3V4qjuhdQOnpLdNdrAb1-4i7stYw&s=xWZdx544jJIxdirIJZLsJNNHbPDNkeG_D0hWp_ADDQM&e=
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> >
> > On Thu, May 9, 2019 at 3:03 AM Aschenauer Elke-Caroline <elke AT bnl.gov>
> > wrote:
> > Dear Yi,
> >
> > are you thinking about the bake out blankets? If yes they need to get
> > removed before you would be able to install the Silicon detector, also
> > they seem to be thicker then 0.1 cm.
> > Rahul any idea what Yi is referring to.
> >
> > cheers elke
> >
> >
> > On May 8, 2019, at 10:29, Yi Yang <yiyang AT ncku.edu.tw> wrote:
> >
> > Dear Bill & Rahul,
> >
> > Elke kindly forwarded a beam pipe drawing which is going to use in the
> > forward upgrade.
> > The radius of the beam pipe is 4.625 cm.
> > However, we remember Rahul mentioned that the beam pipe is also wrapped
> > by something, so we are wondering if it is okay if the inner radius of
> > silicon track is 4.75 mm.
> > Could you please confirm it? Thanks a lot.
> >
> > Cheers,
> > Yi
> >
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Assistant Professor
> > Department of Physics
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web:
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=dlIVkpYOa2ADoHT3V4qjuhdQOnpLdNdrAb1-4i7stYw&s=xWZdx544jJIxdirIJZLsJNNHbPDNkeG_D0hWp_ADDQM&e=
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> >
> > On Wed, May 8, 2019 at 8:39 AM Aschenauer Elke-Caroline <elke AT bnl.gov>
> > wrote:
> > Dear Yi,
> >
> > sorry I wanted to sent this already earlier. Here is the technical
> > drawing from John Scheblein of the STAR original beam pipe we use now and
> > will use for the forward upgrade.
> >
> > cheers elke
> >
> >
> >
> > On May 7, 2019, at 17:54, Yi Yang <yiyang AT ncku.edu.tw> wrote:
> >
> > Dear Elke & Zhenyu,
> >
> > I am wondering if you have chance to get the information of the radius of
> > the beam pipe from Rahul?
> > I think the dimensions of sensor and hybrid are almost fixed, so the only
> > dimension is missing is the radius of the beam pipe.
> > Thanks a lot.
> >
> > Cheers,
> > Yi
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Assistant Professor
> > Department of Physics
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web:
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=dlIVkpYOa2ADoHT3V4qjuhdQOnpLdNdrAb1-4i7stYw&s=xWZdx544jJIxdirIJZLsJNNHbPDNkeG_D0hWp_ADDQM&e=
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
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> > ) `\ +
> > / '. | Elke-Caroline Aschenauer =
> > | `, -
> > \,_ `-/ Brookhaven National Lab +
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> > +
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> >
> >
> >
> >
> >
> >
> >
> >
> > ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-
> > ) `\ +
> > / '. | Elke-Caroline Aschenauer =
> > | `, -
> > \,_ `-/ Brookhaven National Lab +
> > ,&&&&&V Physics Dept., 25 Corona Road =
> > ,&&&&&&&&: Bldg. 510 /2-195 Rocky Point, NY, -
> > ,&&&&&&&&&&; 20 Pennsylvania Avenue 11778 +
> > | |&&&&&&&;\ Upton, NY 11973 =
> > | | :_) _ Tel.: 001-631-344-4769 Tel.: 001-631-569-4290 -
> > | | ;--' | Cell-USA: 001-757-2565224 +
> > '--' `-.--. | Cell-Europe: +49152220025211 =
> > \_ | |—‘
> > -
> > `-._\__/ Mail: elke AT bnl.gov elke.caroline AT me.com
> > +
> >
> > +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> >
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Re: [Star-fst-l] beam pipe radius , (continued)