Star-fst-l mailing list

[Yi Yang <yiyang AT ncku.edu.tw>]

Hi Rahul,

Thanks a lot.

Cheers,

Yi 

On Wed, May 15, 2019 at 9:29 PM Sharma, Rahul <rsharma AT bnl.gov> wrote:

Hi,

4.9cm should be fine!

• Rahul

---

From: Zhenyu Ye <yezhenyu2003 AT gmail.com>
Sent: Tuesday, May 14, 2019 2:22 PM
To: Sharma, Rahul
Cc: Yi Yang; Aschenauer, Elke; star-fst-l AT lists.bnl.gov

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

 

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=Z0GVCSst_PW5asNARJOAtw&m=NJRGOJVoctPG-SVWxCMCqvJZTM68cuBmJ0Tvi1Xcd_A&s=O-QIynzYisKwbaPyk7C_FviBO89_iVx5DUP48F4Nx94&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=Z0GVCSst_PW5asNARJOAtw&m=NJRGOJVoctPG-SVWxCMCqvJZTM68cuBmJ0Tvi1Xcd_A&s=O-QIynzYisKwbaPyk7C_FviBO89_iVx5DUP48F4Nx94&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=Z0GVCSst_PW5asNARJOAtw&m=NJRGOJVoctPG-SVWxCMCqvJZTM68cuBmJ0Tvi1Xcd_A&s=O-QIynzYisKwbaPyk7C_FviBO89_iVx5DUP48F4Nx94&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=Z0GVCSst_PW5asNARJOAtw&m=NJRGOJVoctPG-SVWxCMCqvJZTM68cuBmJ0Tvi1Xcd_A&s=O-QIynzYisKwbaPyk7C_FviBO89_iVx5DUP48F4Nx94&e= 

> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > 
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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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--

+++++++++++++++++++++++++++++++++++++++++++++++++++
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: http://phys.ncku.edu.tw/~yiyang
+++++++++++++++++++++++++++++++++++++++++++++++++++