Scanners in Period 4 and 11 of the PSB Federico Roncarolo BE-BI - - PowerPoint PPT Presentation

Federico Roncarolo BE-BI Paolo Magagnin BE-BI

SPACE RESERVATION REQUEST

EDMS n. 1506932

New SEM Grid Monitor and New Fast Wire Scanners in Period 4 and 11 of the PSB

Exis isting sit situation

Section 4L1 Section 11L1 These two sectors have been chosen to house:

• 1 SEM Grid Monitor
• 8 fast Wire Scanners

In Introductio ion

1 SEM Grid Monitor:

• Turn by turn profile

measurement at the PSB injection requested by BE-OP

• Measurements in ring 3 only will

be sufficient for characterising the PSB injection mismatch

• Sector 4L1 identified as suitable

location. Section 4L1 Section 11L1 SEM 8 Fast wire Scanners:

• Horizontal and vertical

simultaneous scans  Two different section required

• Sectors 4L1 and 11L1 identified as

suitable

• BWS prototype: section 4L1 ring 3

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Tim imescale

1 SEM Grid Monitor:

• YETS 2017 – 2018: SEM Grid

installation Section 4L1 Section 11L1 SEM 8 Fast wire Scanners:

• YETS 2016 – 2017: BWS prototype

installation

• LS2: 7 BWS installation

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Reason for r change

1 SEM Grid Monitor: Essential for turn by turn profile measurement Section 4L1 Section 11L1 SEM 8 Fast wire Scanners:

• Standardisation and reliability

improvement of CERN’s Wire Scanners

• BWS prototype: performance

evaluation before series production

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Detailed description – se section 4L 4L1

• 1 horizontal and 1 vertical BWS required for each ring  horizontal BWS installed in

section 4L1 (1 per ring)

• Longitudinal available space in 4L1 ring 3 for the installations of the SEM Grid +

BWS: 1200 mm

• Preliminary BWS design with a longitudinal dimension of 450 mm, leaving sufficient

space for the SEM Grid.

• New mechanical design of the SEM Grid due to the limited vertical space for the

presence of the other beam pipe: not started yet.

Detailed description – se section 11 11L1

• Vertical BWS installed in section 11L1 (1 per ring)
• Additional pumping capability will be evaluated after the vacuum qualification of

the components and assemblies.

• Not cooling foreseen on BWS due to RF heating

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Conclusions

• The ECR will be written in the first semester of 2016, and will include also the

SEM Grid if the design will be already started

• Investigation of radiation issues will be included in the ECR (radiation dose

planning).