project x rd&d plan instrumentation
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Project X RD&D Plan Instrumentation. Manfred Wendt AAC Meeting February 3, 2009. Outline. Scope and overview of Project X beam instrumentation systems A note to performance and system requirements Primary technical issues and the strategy to address them - PowerPoint PPT PresentationTRANSCRIPT
Project X RD&D PlanInstrumentation
Manfred WendtAAC Meeting
February 3, 2009
Page 2AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Outline
• Scope and overview of Project X beam instrumentation systems
• A note to performance and system requirements
• Primary technical issues and the strategy to address them– Example: Real estate limitations in the MEBT
– Examples of initiated / planned activities: HINS temporary beam diagnostics First beam studies at the proton source e-Cloud measurements and beam studies in the Main Injector e-beam scanner (planned)
• Goals of the plan by year
• Role of outside collaborators– Example: BNL Laserwire collaboration
Page 3AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
System Scope
Beam Instrumentation and Diagnostics Systems
• Measure and characterize beam parameters (beam intensity, orbit, profiles/emittance, phase/timing, halo, etc.) for– Machine commissioning
– Performance evaluation and improvements under various machine conditions, operating modes and a range(?) of beam parameters.
– Detection and analysis of faults and error sources.
• Provide detection systems (BLMs, current monitors) for a fast Machine Protection System (MPS).
• Instrumentation hard-, firm- and software includes– EM and optical detection systems and control elements
– Read-out, analysis and calibration systems
– Infrastructure, cabling, timing and clock systems, DAQ interface
Page 4AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Overview of Beam Monitors
Page 5AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
System Requirements
• Detailed requirements and specifications for beam instrumentation systems have NOT yet been established. Need to:– Requirements to be derived from beam dynamics and operations aspects
(intensity ranges, resolution, precision, operating modes, etc.)
– Define monitor technologies, e.g. button vs. cavity-style BPM in 1.3 GHz SCRF cryomodules
– Exact location / layout / space / # of beam detector components. Space limitations: Optics / diagnostics balance (beam quality vs. diagn.)
• Establish a physical layout based on system installation numbers– Optimization / distribution of racks/crates vs. cabling, tunnel electronics(?)
– Standardization of electronics hard- & software (e.g. VME/VXS, TCA, ...)
• Specification of the Machine Protection System (with Controls)– Operating modes (long/short pulse), response times, detection elements
Page 6AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
(Technical) Issues
• Most technical issues on high-intensity beam instrumentation systems are have been addressed and resolved elsewhere, e.g. SNS, but also DESY FLASH (“cold” beam monitors). However:– Exact specifications and the conceptual design has to be worked out.
– Limited real-estate in MEBT, SCRF spoke-resonator and cryo-modules.
– Location / type of tr. profile monitors for emittance measurements.
– Detection of tr. beam halo (vibrating wire, laser wire) and long. beam tails (mode-locked fiberlaser) to prevent beam losses.
• Need onsite development / experience with non-invasive beam diagnostics (laser wire, e-beam scanner)– Minimize radiation background, instrument survival.
– Emittance / profile monitoring in the transport line!
• Infrastructure, integration, standardization, DAQ (Controls)– Synchronized time stamping of data, low-jitter (sub-ps) clock signals
Page 7AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
HINS MEBT Real Estate
• SNS MEBT Diagnostics:– 6x BPMs
– 2x Beam current
– 5x Wire scanner
– Diagnostics “Tank” 2x Multiwire / slit Beamstopper Mode-locked laser
– 3x BLM
HINS MEBT
Page 8AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Technical Strategy
• Collect information– Workshop participation (HB, BIW, DIPAC, Care) information exchange
– Visit of potential collaborators, e.g. SNS, BNL, LBNL, SLAC
– Meetings, meetings, meetings,…(requirements & specifications!)
– Review of specific instrumentation systems, e.g. HINS MEBT diagnostics, cryomodule BPMs, etc.
• Instrumentation RD&D targets (need beam!)– HINS H- front-end (various linac instrumentation)
– Main Injector (e-cloud, e-beam scanner, IPM)
– NML test accelerator (cryomodule BPMs)
• Develop, build and test mission critical beam instruments, e.g.– MEBT diagnostics (orbit, emittance & phase monitors)
– “Cold” BPMs, phase pickups (1.3 GHz cryomodule, spoke-resonators)
– Non-invasive beam instruments
Page 9AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Practical Activities
HINS Temporary Diagnostics
Water CooledBeam Dump
BPM
WireScanners
RFQToroid
Page 10AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
1st HINS Beam Measurements
Beam• 45 kV Protons• 2-3 mA• 100 s pulse• 0.1 HzSolenoids• Up to 7.8 kG Trim Dipoles• Up to 100 G
Page 11AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
e-Cloud Measurements
• Microwave transmission (phase velocity) measurement:– From plasma physics, microwaves travelling along a waveguide
(vacuum chamber)
– Phase shift due to a homogeneous plasma
– Microwave dispersion relation:2
2222
ck pc
22
2
2 c
p
cl
For an electron cloud
is proportional to e density
22 4 creep
Page 12AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Time Resolved Measurements
• Direct Phase e-Cloud Measurements– Mix the transmitted signal with the source
and measure the baseband component.
– The phase difference translates into a DC offset at the mixer output.
– We can observe the development of the e-Cloud as the beam passes!
– Data shown represents one machine turn (TbT time resolution).
Page 13AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
e-Beam Scanner
• e-beam gets deflected by the p-beam
• Defection depends on– e-beam energy and position– p-beam charge and
distribution
Electron Beam
Proton Beam
Electron Beam
Proton Beam
Electrons aboveProtons
Electrons belowProtons
Electron Gun Electron BeamPosition Detector
Electron Beam
Proton Beam
SNS e-beam scanner,build by Russian collaborators
Page 14AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Goals and Timeline
• FY09– Specifications & requirements
– Conceptual layout of beam diagnostics.
– Continue started / initiate new RD&D activities at HINS & MI.
• FY10– Focus on mission critical RD&D projects, e.g. laserwire, e-beam
scanner, e-Cloud, MEBT instrumentation, cold BPMs, read-out systems, beam loss monitoring, and more.
• FY11– Finalize design and development activities.
– Summarize operation experience on some prototypes (HINS, MI)
• FY12– Freeze designs, overall system layout.
Page 15AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Collaborators
• Project X Collaboration Initiative (November 2008):– Interest on beam instrumentation collaboration projects from
SNS, LBNL, and SLAC
• SNS– Various advanced diagnostics systems (broadband Faraday-cup, e-
beam scanner, MEBT beam instrumentation, Allison scanner, etc.)
– Support, information exchange, RD&D help, visits, reviews, etc.,but no design or development activities
• LBNL– Collaboration on e-Cloud measurements
– EOI on the development of a mode-locked fiber laser system for long. bunch profile measurements (also bunch tails).
• SLAC– Collaboration on a new, xTCA-based electronics platform (Controls).
Page 16AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
BNL Laserwire Collaboration
BNL test:– 750 keV H- beam– Faraday-cup e- detector
Page 17AAC, February 3, 2009 – Project X Instrumentation, Manfred Wendt
Summary
• A short overview of the Project X beam instrumentation systems, the related issues and a resolution strategy was presented.
• The exact requirements, specifications, and performance of beam instrumentation systems and diagnostics need still to be defined.
• A preliminary RD&D plan covers prototyping of various known and novel beam diagnostics. Emphasis is put on non-invasive beam detectors.
• Beam studies of prototypes will take place at the HINS and NML test facilities, and the Main Injector.
• Preliminary RD&D goals have been presented.
• LBNL, SNS, and SLAC have expressed interest to collaborate on various projects in advanced beam instrumentation and controls.