EMMA Project Delivery

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EMMA 24th February 2009 ALICE Stakeholder
Meeting
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EMMA Layout
IOT Racks
3
EMMA Infrastructure upgrade in progress in ALICE
Accelerator Hall
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Injection Line Assembly in progress in S Block
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Integration
ALICE
Diagnostics Beamline
IOT Rack
RF Distribution
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Aims Objectives of EMMA Project

• Worlds first NS-FFAG (non-scaling Fixed Field
  Alternating Gradient) accelerator
• FFAG Field fixed in time but varies across pipe
• Nonscaling Dipole field scales with momentum
  but focussing quadrupole fields do not
• Optics changes during acceleration
• Betatron Tune changes during acceleration
• Resonances unavoidable
• But rapid acceleration means this is not fatal.
  (We hope)

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CONFORM

• CONFORM ( COnstruction of a Nonscaling FFag for
  Oncology, Research, and Medicine )
  www.conform.ac.uk/
• Total funds 6.9m over 4 year project lifecycle
  from RCUK Basic Technology from 1st April 2007
• Led by University of Manchester and The Cockcroft
  Institute including RAL, JAI, and others. Also
  FNAL, Brookhaven, Grenoble
• EMMA design and construction
• PAMELA design study for hadron therap machine
• Applications study for other applications
• BASROC (British Accelerator Science and Radiation
  Oncology Consortium) umbrella group of academic,
  medical and industry specialists in accelerator
  and medical technology with the aim of promoting
  the use of accelerators in science, industry and
  medicine. www.basroc.org.uk/

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EMMA Basic Parameters
Energy range 10 20 MeV
Lattice F/D Doublet
Circumference 16.6 m
No of cells 42
Normalised transverse acceptance 3p mm-mrad
Frequency (nominal) 1.3 GHz
No of RF cavities 19
Average beam current 13 µA
Repetition rate 1, 5, 10, 20 Hz
Bunch charge 16-32 pC single bunch
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Requirements

• Full aperture injection and extraction at all
  energies 10 20 MeV
• Many lattice re-tunings (vary ratio of dipole to
  quadrupole fields)
• Vary frequency, amplitude and phase of RF
  cavities
• Non-accelerated operation to map closed orbits
  and tunes vs momentum
• Map longitudinal and transverse acceptances with
  probe beam
• To be heavily instrumented with beam diagnostics,
  etc.

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Ring Magnets

• Requirements / Solution
• Adjust dipole quadrupole components
  independently - Mount magnets on independent
  radial linear slides
• Fields identical in every cell despite kickers
  and septum - Field clamps at cell entrance face
  of QD exit face of QF. Adjusted at the factory
  
• Very large good field region for range of closed
  orbits - Optimised pole profile implemented

• Due to extreme compactness of lattice, D F
  magnets
• Are in very close proximity. Consequence field
  computation and measurement with both magnets in
  place has been essential. Results from the
  prototype measurements have been implemented in
  the lattice simulations
• Are short compared with aperture. Consequence
  integrated strength is dominated by end-field
  contributions

All magnets scheduled to be delivered from TESLA
by 10th April 2009
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RF Cavities

• 20 (19 spare) production cavity construction in
  progress give fast acceleration
• 4 of 5 batches delivered to DL
• 5th batch scans awaiting approval by DL

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Injection/Extraction Septum Design

• In house design of septum and vacuum chamber in
  progress
• Wire eroding of lamination stacks is in progress.
  Delivery scheduled for Feb Mar 2009
• Manufacture Misc. septum components Apr May
  2009
• Magnet measurements scheduled for Jun 2009

Section view of septum in vacuum chamber
ISO view of septum with vacuum chamber removed
Plan view of septum in vacuum chamber
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Kicker Magnet Design

• Kicker component manufacture by Brite Precision,
  Newbury
• Ferrite blocks manufactured by Ceramic Magnetics,
  New Jersey
• Prototype kicker magnet complete. Four
  production devices to follow subject to
  successful testing
• Delivery to APP in early March to be used as the
  test load for the kicker power supplies

100 mm
Ferrite CDM5005 C core (Ceramic Magnetics, New
Jersey)
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Standard Ring Vacuum Chamber

• Contract placed for BPM pickups with Testbourne.
  Delivered November 2008
• Contract placed with VG Scienta for the vacuum
  chambers. Manufacture in progress Batch
  Delivery March 2009
• Clean vacuum testing RGA cleanliness tests at
  the factory before delivery to Daresbury
• Particle processing at Daresbury

BPM Block
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RF Distribution

• Contact placed with Q-Par Angus in Oct. 2008
• Manufacture and testing in progress
• Delivery due end of March 2009

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RF Source

• Inductive Output Tube
• VIL409 90 kW Transmitter
• Contact placed with CPI in Sep. 2008
• Full testing at CPI before delivery
• Delivery due end of March 2009
• Commissioning at Daresbury in late April early
  May

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INJECTION LINE ALICE to EMMA
ALICE
New Dipole 30
Vacuum valve
Tomography Section Screens x 3 (emittance
measurement)
SRS Quadrupoles x 3
Vacuum valve
BPM Position measurement
Emittance measurement
Screen
SRS Quadrupoles x 2
Wall Current Monitor
Screen
EMMA Ring
Screen Vert. Slit
Beam Direction
New Dipole 30 BPMs at dipole entrance Position
measurement
Vertical Steering Magnet x 2

• Match the probe beam to the requirements of EMMA
• Measure the properties of the probe beam

Beam Dump
Combined H and V Steering Magnet x 4
Ion Pump
New Dipoles x 2 (33) BPMs at dipole
entrance Position measurement
New Quadrupoles x 13
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DIAGNOSTICS BEAMLINE LAYOUT
Spectrometer BPM _at_ dipole entrance Screen Faraday
Cup
Extracted momentum
Screen x 3 Tomography Section
SRS Quadrupoles x 6
New Quadrupoles x 4
Emittance measurement
Screen Vert. Slit
Wall Current Monitor
E-O Monitor
Location for Transverse Deflecting Cavity (NOT IN
BUDGET)
Current measurement
Longitudinal profile
BPM Valve
Screen
ALICE
Vertical Steering Magnet x 2
New Dipole (43) BPMs at dipole entrance
Combined Horizontal and Vertical Steering Magnets
x 4
Position measurement
New Quadrupoles x 4
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Timescale for Installation

• ALICE shutdown 25 Oct - 21 Nov 2008 Complete
• Diamond drilling of ALICE wall, cable tray
  installation
• EMMA off line build of modules in S block Nov
  2008 - Jul 2009 9 months
• ALICE shutdown (In progress now) 23nd Feb -
  29th Mar 2009 5 weeks
• EMMA Cable pull (90) through external labyrinth,
  ALICE Dipole installation, Injection line girders
  through equipment access doorway
• EMMA installation in Accelerator Hall Mar -
  Aug 2009 6 months
• ALICE shutdown (dates to be confirmed) 8th Jun
  - 13th Jul 2009 5 weeks
• EMMA Cable pull through external labyrinth (10),
  Controls cable pull through the control room
  labyrinth, Ring girder installation through
  equipment access doorway (except Injection
  Extraction girders)
• Injection line complete ready for commissioning
  with electrons 19th Jul 2009
• Test IOT May 2009
• Install RF waveguide distribution Aug 2009
• Commission RF Sep 2009

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Summary

• Design phase and Procurement is well advanced
  with major contracts placed
• Major components started to arrive in November
  2008, off-line build is in progress
• Access to ALICE accelerator Hall required for
  installation work
• Shutdowns required to ALICE to open the cable
  route labyrinth
• We aim to have the ALICE to EMMA Injection line
  ready for commissioning with electrons by 19th
  July 2009
• We aim to be ready for commissioning the EMMA
  ring with electrons by 1st November 2009