1. cNPM pre-CDR Concluding Remarks
Cyrille Thomas
cNPM System Lead – Beam Instrumentation ESS
2 May, 2019

2. Project Status Oct 2017 Nov 2018 Dec 2020? PDR Details design
CDR
Production
Installation
Commissioning
PDR
Concept well defined, but technologies for signal readout undecided among at least 3 possible choices
Details design
Testing and demonstrating design of HV cage reaching high field strength: 30kV possible, but 60kV challenging
Testing and comparing the 2 selected readout technologies:
MCP + Metallic strips
MCP + camera
Tests not complete: delays in deliveries, delivered broken MCP, test beam not fully controlled and more experimental than user facility
More time with beam to complete the tests in September
Intermediate results demonstrated both technologies applicable to ESS
Project in time with the ESS Project

3. Perspective and Developments
Hardware:
MCP behaviour: results showed trustable measurement, but limitation of the control system leaves uncertainty
Proposal of an assembly permitting maintenance without fully opening the LWU
Camera: most integration aspect under control, signal processing and delivery fairly straightforward, but issues with radiation environment.
Transport of the image to shielded environment not demonstrated yet
Strips: Fairly robust, signal trustable, but signal processing and integration not trivial, and yet to be done.
MCP in situ calibration not demonstrated yet. Issue to find the deep UV source
HV cage: demonstration to reach 30kV and above in either polarisations

4. Perspective and Developments
Control Software:
Camera: choice of GiGE camera and AreaDetector for control, but can benefit from development from IMG for processing images
HV: ISEG PSU already in EPICS in use for FC, EMU; ioc and control system to be developed for cNPM
Strips: Electronics not in EPICS; it implies development of EPICS control for the SYROCO AMC card and CARAMEL and CARAS daughter cards

5. 2D vs. 1D 2D: measurement of angle and divergence IPHI beam
IPM / Hamamatsu MCP / standard low performance GiGE camera

6. 2D vs. 1D 2D: Pros Cons 1D: Pros Cons
Measurement of beam profile and size demonstrated
Measurement and processing straightforward, profile from image processing from AreaDetector plugin
Information on angle and divergence can be obtained with new developed plugin
14Hz acquisition demonstrated
Signal from beam loss leaves clear signature that can be taken out
Cons
Camera should be located in shielded area
Lifetime of scintillator
Lifetime of MCP
1D:
Pros
Measurement of profile and size demonstrated
Lifetime of strips
Signal processing robust
14Hz acquisition demonstrated although not direct triggering
Cons
Lifetime of MCP
Less intuitive than images
Particle loss in detector may be difficult to identify and remove
Location of acquisition card may be an issue (short distance and shielded)

7. Discussion Topics HV intensity and polarisation and impact on the beam
Model of the Halo at ESS and beam loss on the IPMs
Bonus from 2D instrument
EPICS integration and control
Installation process and particles free device
Mechanical assembly proposal for MCP maintenance
Installation Plan