Home Page of the Lectures Cornell Physics 688/488

"Advanced Topics in Accelerator Physics:"

"Accelerator Physics for an ERL x-ray Source"

Physics Department, Cornell University

Professor:

Georg Hoffstaetter

 

Georg.Hoffstaetter@cornell.edu

 

118 Newman lab


Energy Recovery Linacs are a new kind of linear accelerators. To use such an accelerator to construct an x-ray source poses many challenges. This course will introduce into accelerator physics, emphasizing the aspects that are most relevant for the design and construction of an x-ray source based on this new kind of high-energy electron accelerator. There will be guest lectures by several important players in Cornell's effort to build an Energy Recovery Linac.

Electron Microscope    CESR at Cornell     LHC at CERN  

Dates and draft meeting times
Mo 01/ 21/ 08, 12:20-13:10 132 Rockefeller Hall First lecture
We 01/ 23/ 08, 12:10-13:20 132 Rockefeller Hall Second lecture
Mo 01/ 28/ 08, 12:00-13:15 301 Wilson lab Third lecture
We 01/ 30/ 08, 11:45-13:00 301 Wilson lab Fourth lecture
Fr 02/ 01/ 08, 11:45-13:00 301 Wilson lab Fifth lecture
Mo 02/ 04/ 08, 12:00-13:15 301 Wilson lab Sixth lecture
Fr 02/ 08/ 08, 11:45-13:00 301 Wilson lab Seventh lecture
Fr 02/ 15/ 08, 11:45-13:00 301 Wilson lab Eighth lecture
Mo 02/18/08, 12:00-13:15 301 Wilson lab Lecture
We 02/20/08, 11:45-13:00 301 Wilson lab Lecture
Mo 02/25/08, 12:00-13:15 301 Wilson lab Lecture
We 02/27/08, 11:45-13:00 301 Wilson lab Lecture
Mo 03/03/08, 12:00-13:15 301 Wilson lab Lecture
We 03/05/08, 11:45-13:00 301 Wilson lab Lecture
Mo 03/10/08, 12:00-13:15 301 Wilson lab Lecture
We 03/12/08, 11:45-13:00 301 Wilson lab Lecture
Mo 03/24/08, 12:00-13:15 301 Wilson lab Lecture
Fr 03/28/08, 11:45-13:00 301 Wilson lab Lecture
Mo 03/31/08, 12:00-13:15 301 Wilson lab Lecture
We 04/02/08, 11:45-13:00 301 Wilson lab Lecture
Mo 04/07/08, 12:00-13:15 301 Wilson lab Lecture
We 04/09/08, 11:45-13:00 301 Wilson lab Lecture
We 04/16/08, 11:45-13:00 301 Wilson lab Lecture
Fr 04/18/08, 11:45-13:00 301 Wilson lab Lecture
Every Mo after 04/21/08, 12:00-13:15 301 Wilson lab Lecture
Every We after 04/23/08, 11:45-13:00 301 Wilson lab Lecture
Mo and We 03/ 17 - 03/ 21 No class Spring break
We 04/ 30/ 08, 11:45-13:00 301 Wilson lab Last lecture
Fr 05/ 16/08, 11:30 am 226 Wilson Lab Deadline for takehome final
Mo and We 13:00-14:00 226 Wilson Lab Office hours, Prof. Hoffstaetter

Participation:

In case you would like to audit this class, could you please tell the physics department that you are auditing; you have to fill out the attached extramural continuing education form (pdf). It is important that the physics department knows that a reasonable number of people are interested in accelerator classes, otherwise it is hard to offer such classes on a regular basis. The course ID # is 532-717 for Phyics688, Advanced Topics in Accelerator Physics, 3 credits. For Cornell employees, the form must be signed by the student's supervisor, the department head (BJ Bortz for LEPP) and the instructor Georg Hoffstaetter.

Literature

Required
Material will be photocopied by the lecturer.
Optional:
Particle Accelerator Physics I and II, Helmut Wiedemann, Springer, 2nd edition, 1999, ISBN 3 540 64671 x
Related material:
Handbook of Accelerator Physics and Engineering, Alexander Wu Chao and Maury Tigner, 2nd edition, World Scientific, ISBN: 981 02 3858 4

Lecture notes

Week of 01/21/08
1) History of Accelerators
- Van de Graaff Accelerator
- Cockroft-Walton Accelerator
- Marx generator
2) Cyclotrons, Homework 01, Solutions
- Synchrocyclotron
- Isocyclotron
- Edgefocusing
- Alternating gradient focusing
- Betatron
- Wideroe linear accelerator
- Traveling and standing wave acceleration
- Alvarez linear accelerator
- Radio frequency quadrupole
- Microtron
3) Synchrotrons
- Storage rings
- Colliders

Week of 01/28/08
Synchrotron Radiation Sources
- Generations of x-ray sources
4) Undulator radiation
5) Radiation Power, Homework 02, Solution
6) Bend Radiation

Week of 02/04/08
7) Wigglers and Undulators, Homework 03, Solution
8) FEL amplifiers, Homework 04, Solution
9) FELs, SASE FELs, HGHG FELs

Week of 02/11/08
10) Linear Beam Dynamics, Homework 05, Solution
- Twiss parameters
- Phase space ellipse
- Phase space distribution

Week of 02/25/08
11) Photo Emission Guns, Guest lecture by Bruce Dunham
- High voltage technology
- Laser technology
- DC guns
- RF guns
- SRF guns
12)
Space Charge Issues, Guest lecture by Ivan Bazarov
- Child-Langmuir law,
Homework 06, Solution
- Emittance measurement
- Busch's theorem
- Paraxial ray equation
- Drift bunching

Week of 03/03/08
13) Twiss parameters
- Invariants of motion
- Propagation of Twiss parameters
- From Twiss to transport matrix,
Homework 07, Solution
14) Envelope equation, Guest lecture by Ivan Bazarov

Week of 03/10/08
15)
The ERL prototype gun, Guest lecture by Bruce Dunham
Lasers for photoemission guns, Guest lecture by Dimitre Ouzounov
16)
Linacs, Homework 08, Solution
- Transport maps and Twiss parameters for cavities
- The normalized emittance

Week of 03/24/08 Guest lectures by Matthias Liepe
17) Accelerating cavities
- Cavity design
18)
Higher order mode spectrum
- HOM measurements
- HOM damping
Beam instabilities
- Beam Breakup Instability
- Fast Ion instability

Week of 03/31/08 Guest lectures by Sergey Belomestnykh
19)
SRF technology
- Properties of superconductors
20) Cavity preparation techniques
- SRF cryomodules
- Operation of SRF linacs

Week of 04/07/08
20) Hamiltonian motion
- Lioville's theorem
- Invariatn emittance
21) Perturbations to phase space motion
- Orbit Correction
- Dispersion
22) Field Gradient Perturbations
- Optics Measurements and Corrections
Week of 04/14/08
23) Radiative Effects
- Phase Focusing and Synchrotron Oscillations
- Energy Spread Damping by Radiation
- Energy Spread Damping by Stochastic Photon Emission
- The Equilibrium Energy Spread in Rings
- Emittance Reduction by Radiation
- Emittance Increase by Stochastic Photon Emission
- Equilibrium Emittance in Rings
- Emittance Increase by Radiation in an ERL

Week of 04/21/08
24) Longitudinal beam dynamics
- Isochronous beam transport for curvature correction in ERLs
- Bunch compression
25) CSR Effects
- Energy loss from CSR
- CSR wake
- micro-bunching instability
Week of 04/28/08
26) Nonlinear Optics
- Nonlinear dispersion
27) Nonlinear time of flight
- Energy dependen Twiss parameters
Cornell's ERL prototyping facility
- Cornell's DC photocathode gun
- Cornell's injector linac
- ERL merger test area

Takehome Final

Grading

The grade will be based on homework and a takehome final. This class will count for 3 credits.

Send comments to G. H. Hoffstaetter

Last Update: 02/26/2008