CEPC Calorimeter Discussion

Thursday 25 Apr 2024, 10:30 → 12:30 Asia/Shanghai

A418 (Main Building)

Jianbei Liu (University of Science and Technology of China) , Yong Liu (Institute of High Energy Physics)

Zoom connection information

• ZOOM Meeting Link

• Meeting ID: 666 4623 8623

• Passcode: cepc-tdr

10:30 → 10:35 Introduction and news

Speakers: Jianbei Liu (University of Science and Technology of China) , Dr Yong Liu (Institute of High Energy Physics)

2024_0422_Calorimeter_Thickness_Updates.pdf

2024_0423_Email_Discussions.pdf

10:35 → 10:55 Electronics, mechanics, physics and software: discussions on CEPC-TDR

Conveners: Jinfan Chang (高能所) , Manqi Ruan (IHEP) , Shaojing 侯少静 (高能所) , Sheng-Sen Sun (Institute of High Energy Physics)

10:35 Calorimeter electronics

Speaker: Jinfan Chang (高能所)

10:40 Calorimeter layout and mechanics

Speakers: Quan JI, Shaojing 侯少静 (高能所) , Sheng-Sen Sun (Institute of High Energy Physics)

计算.pptx

10:45 Calorimeter software

Speakers: Fangyi Guo, Sheng-Sen Sun (Institute of High Energy Physics)

10:50 Physics performance related to calorimeters

Speaker: Manqi Ruan (IHEP)

10:55 → 11:25 CEPC calorimeter options: Mechanics Designs and Considerations

Convener: Jianbei Liu (University of Science and Technology of China)

10:55 Plastic scintillator ECAL and HCAL

Speaker: Yunlong Zhang (University of Science and Technology of China)

11:00 Silicon ECAL and glass-RPC HCAL

Speaker: Haijun Yang (Shanghai Jiao Tong University)

11:05 Highly granular crystal/glass ECAL

Speaker: Dr Yong Liu (Institute of High Energy Physics)

11:10 Stereo crystal ECAL

Speaker: Huaqiao ZHANG (IHEP)

11:15 Glass HCAL

Speakers: Peng Hu (IHEP) , Sen Qian (高能所)

11:20 Wrap-up

Speaker: Jianbei Liu (University of Science and Technology of China)

2024_0425_Calorimeter_Thickness_Updates.pdf

2024_0425_Calorimeter_Thickness_Updates.pptx

11:20 → 11:23 AOB

Speaker: All

11:23 → 11:25 Minutes

Speakers: Fangyi Guo, Dr Yong Liu (Institute of High Energy Physics)

尺寸目标：收敛到总体尺寸边界。

ScECAL: 可以调整冷却方案、Cu-W比例进一步控制尺寸，保持总厚度缩小到300mm以内可以达到

    Action item: ECAL根据多边形边数确定内外圆半径，确认总体可保持在300mm同心圆内。

晶体ECAL：两个方案都在300mm以内

HCAL：探测器厚度<1311 mm，16边形外半径R～3580 mm. 

端盖：暂时与barrel保持一致，可以稍减薄，需要进一步计算。

端盖与桶部之间的缝隙：需要考虑电子学和桶部支撑。HCAL端盖需要考虑为MDI提供支撑结构。 

端盖内径：目前与CDR保持一致，ECAL R=350 mm (cos(theta)~0.993)，HCAL R=400 mm.

 

ECAL机械结构强度计算（Shaojing）

32边形机械变形2.2cm，需要在中间加一圈固定，加后变形4mm可接受。

Stereo ECAL外侧全部加碳纤维机械结构，添加后变形7mm，可以接受。

散热：电子学发热20W有点高，可到12W，修改后温度梯度估计约6～7度。