[Solid_tof] 回复: MRPC position resolution

Zhiwen Zhao zwzhao at jlab.org
Thu Sep 1 23:54:52 EDT 2016

Dear Yi

Thanks for your quick reply.

PreCDR mentioned
strip length about 15cm, width 2.5cm
module length about 15cm,width about 30cm

So I think I can assume MRPC position resolution
1. offline analysis stage, 0.5x0.7cm  (2.5/sqrt(12)=0.7)
2. level 3 trigger stage, 15x2.5cm
3. level 1 trigger stage, 15x30cm

Please let me know if you see anything wrong


On 9/1/2016 9:58 PM, yiwang wrote:
> Dear Zhiwen,
> Our MRPC is strip readout. The spatial along the strip can be obtained
> according the time differenc of sginals of two ends, it ls about a few
> mms. The spatial across the strip is about strip width/square root of 12.
> best regards,
> ------------------------------------------------------------------------
> Yi Wang
> Department of Engineering Physics, Tsinghua University
> Liuqing Building Room412, Beijing, 100084, China
> Phone and Fax: 8610-62771960
> Mobil: 86-13331129352
> *From:* Zhiwen Zhao <mailto:zwzhao at jlab.org>
> *Date:* 2016-09-02 05:24
> *To:* yiwang <mailto:yiwang at mail.tsinghua.edu.cn>; solid_tof
> <mailto:solid_tof at jlab.org>
> *Subject:* MRPC position resolution
> Dear Yi
> What's the estimation of MRPC position resolution?
> It can be useful for us to estimate overall performance for different study.
> I am thinking it could be at different level
> 1. offline analysis stage.
> Together with timing resolution, this will affect PID. The hit can be a
> seed for tracking also. This needs the best resolution possible.
> 2. level 3 trigger stage.
> We want to use hit on MRPC as a seed for a fast and rough tracking. This
> resolution can be larger, but can be obtained quickly with limited info,
> maybe close to readout strip size?
> 3. level 1 trigger stage.
> we want to match the hit on MRPC to these 100cm2 EC modules. so the
> resolution can be very rough, maybe just module size?
> So I am guessing 1mm,1cm,10cm for 1,2,3
> Please let me know what's the best value you can estimate for now.
> This would be very helpful.
> Thanks
> Zhiwen

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