Spring: The course is intended for graduate students who want to gain knowledge about
contemporary particle accelerators and their applications. During the semester, students
will learn the basics on accelerator physics principles and accelerator operation
as well have the unique opportunity to gain “hands-on” experience on an operational
accelerator. Students will also learn advanced computational techniques in order to
model and analyze their experiments.
The course will cover a wide array of the measurements and manipulations that are
needed for beam dynamics studies. Upon completion, students are expected to understand
the basic principles and relations of beam dynamics, many of which they will have
experimentally verified. Furthermore, they will have gained experience in measurement
techniques and analysis of experimental observations.
While emphasis will be given on experiments, it will also offer exposure to the latest
accelerator computer simulation techniques.
Several major topics will be covered during the semester:
optical imaging and processing using both fast and integrating devices
phase space mapping and emittance measurement
longitudinal dynamics and energy spread, beam control
Overall, students will be exposed to a number of state-of-the-art diagnostics and
A total of 7 experiments will be conducted focusing in three different research areas:
Beam control and focusing, beam diagnostic techniques, and electromagnetic phenomena
on particle beams. The students will have hands-on experience on an operational accelerator
and will be responsible for setting up the equipment, obtaining their own measurements,
and analyzing the data. For same experiments students will be asked to model the experiments
and compare results with measurements. Three lectures will be given – one for each
group of experiments. During the lecture the students will learn the basics on beam
diagnostic and imaging methods, beam manipulation techniques as well as the basic
theory on electromagnetic phenomena on particle beans. A fourth lecture will be devoted
on advanced computation techniques for analyzing results in accelerator physics. The
primary simulation codes for this class will be ASTRA and ELEGANT while some experience
with MATLAB, or Mathematica will be useful. During the semester, students will prepare
two reports (each at different group areas). The content should include: 1) A background
section which describes the experiment and explain the objectives, 2) A summary of
measurements taken in the lab, 3) detailed data analysis and discussion, and 4) conclusion
remarks. In addition, at the end of semester each student will be asked to prepare
a presentation covering an experiment from a different group of experiments from any
of the reports
LOCATION: The first class will be at Stony Brook University, Chemistry Building 124
All remaining classes will be at Brookhaven National Laboratory (BNL), Building 820
IMPORTANT: When you arrive at BNL's main gate, please inform the guard you are attending
the Advanced Accelerator Laboratory Course at the ATF. You may be requested to check
in at the nearby security trailer or research support building (Bldg. 400), where
proper visitor identification may be required . We highly recommend that you will
arrive no later than 3:30 pm during your first time for registration.
Transportation info can be found here:  A list of BNL maps can be found here: 
Directions to the classroom are here:
Textbook and suggested materials
- “The Theory and Design of Charged Particle Beams” by Martin Reiser, published by Wiley
- “Fundamentals of Beam Physics” by James Rosenzweig, published by Oxford 2003
- “Classical Electrodynamics”, third edition, by J.D. Jackson, published by Wiley (1999).
Chapters 11 and 12 are of particular relevance to this course.
- Accelerator Physics, by S. Y. Lee
- Data Reduction and Error Analysis for the Physical Sciences, P.R.Bevington & D.K.
Robinson (2nd or 3rd ed., McGraw-Hill Inc., 1992, 2002)
- 20% active participation in the lab
- 60% lab report
- 20% presentation
There will be no final exam.
List of topics
The following topics are taken mostly from Physical Review Letters. All topics correspond
to breakthrough experiments conducted at the Accelerator Test Facility.Two examples
- 1. Dielectric Wakefield Acceleration of a Relativistic Electron Beam in a Slab-Symmetric
Dielectric Lined Waveguide
- 2. Seeding of Self-Modulation Instability of a Long Electron Bunch in a Plasma
- 3. Experimental Observation of Suppression of Coherent-Synchrotron-Radiation–Induced
Beam-Energy Spread with Shielding Plates
- 4. Generation of trains of electron microbunches with adjustable subpicosecond spacing
- 5. Subpicosecond Bunch Train Production for a Tunable mJ Level THz Source
- 6. High-quality electron beams from a helical inverse free-electron laser accelerator
- 7. Experimental Study of Current Filamentation Instability
- 8. Simple method for generating adjustable trains of picosecond electron bunches
- 9. Resonant excitation of coherent Cerenkov radiation in dielectric lined waveguides
NEW: Project topics for Spring 2015 class can be downloaded here:
- 10. "A Plasma Physics Perspective on Accelerating Electrons" by Navid Vafaei-Najafabadi
March 23 2020 lectures
The following topics was given online for CUNY students:
- 1. "A bit of Accelerator Physics by" V.Litvinenko (presented by M.Fedurin)
- 2. "About BNL ATF" by M.Fedurin
- 3. "A Plasma Physics Perspective on Accelerating Electrons" by Navid Vafaei-Najafabadi
(presented by M.Fedurin)
List of experiments
Group A: Beam control and focusing
A1: Measurement of quantum efficiency
During this lab activity the students will learn to setup and operate a photocathode
gun, measure electron beam charge, measure the photocathode yield –e.g. quantum efficiency
(QE), and study its dependence with the laser parameters.
A2: Magnetic measurement:
During this activity the students will measure the magnetic profile of a quadrupole
lens by using a strained wire. Then, they will model a particle beam passing through
a quadrupole that uses the focusing field measured in the experiment. The impact of
magnet misalignments or positioning errors on beam dynamics will be numerically analyzed.
Group B: Beam diagnostic techniques
B1: Emittance measurement with a quad scan
The students will vary the magnet focusing strength (measured in A2), record beam
images for each setting on a fluorescent screen and measure rms beam size. Then, by
fitting the data to a polynomial fit, they will measure the beam emittance (by using
the theory taught in class). The students will also compare the measurements with
predictions from numerical calculations.
B2: Emittance measurement with a screen method
The students will steer the beam through four profile monitors and record images.
Then they will analyze the images and obtain the beam size on each screen. Using theory
(taught in class) they will obtain the beam emittance using statistical analysis.
B3: Phase-space mapping
During this exercise the students will measure the beam profile for different magnet
settings. Then using tomographic principles (taught in class) will obtain the 2-D
beam phase-space by using the measured 1-D profiles. From the phase-space and by doing
appropriate statistical analysis they will extract important beam parameters such
as the beam size and divergence.
Group C: Electromagnetic effects on particle beams
C1: Coherent synchrotron radiation
Coherent synchrotron radiation (CSR) effect is responsible for energy spread increase
and emittance degradation for short electron bunches in systems included bending magnets.
Students will conduct a set of energy profile measurements using beam profile monitor
installed at location with large dispersion. As a results of measurements students
will be able to reconstructs CSR effect dependency on bunch length, charge per bunch
and peak current. These measurements could be supported by numerical simulation using
accelerator design codes (e.g. ELEGANT).
C2: Generation of bunched beams
In this clas s students will learn mask technique developed at ATF: the idea, purpose
and procedure. Mask transmission contrast measurements will be proposed for practice.
During measurements students will vary beatatron beam size by control quadrupoles
triplet strength located upstream of beamline dogleg section. Series of saved BPM
images have to be analyzed, dependence of mask transmission contrast from beam can
be derived. Data supposed to be filtered and averaged, error from charge fluctuations
can be estimated.
All students must complete online general training “Guest Site Orientation” (TQ-GSO).
In addition, here is the list of online ATF - specific training that you should also
take prior to your arrival at ATF:
- Static Magnetic Fields
- LOTO Affected (Awareness)
- ATF Awareness
- Any student with medical conditions/implants affected by magnetic fields needs medical
clearance prior to entry into exp hall or work with magnetic measurements.
||Brief description of Experiment
||Mon, Jan 27
This class will take place at SBU P117. All remaining classes will be at BNL
||Mon, Feb 3
||Course overview, administrative issues.
||Mon, Feb 10
||Modeling photo-injectors, Introduction to ASTRA
Quantum efficiency measurements
||Mon, Feb 17
HOLIDAY (President's day)
BNL site closed
||Mon, Feb 24
||Operation of radio-frequency cavities, phase-dependence
||Mon, March 02
||Advanced acceleration topics #1. Beam Diagnostics, emittance measurement techniques
||Operation of position monitors; beam profile monitors; energy analyzer; emittance
measurement with a BPM scan
||Mon, Mar 9
||Beam dynamics simulations
Lecture and QA, Computational
||ATF computer Lab
||Mon, Mar 16
Spring Break (no class)
||Mon, Mar 23
||Beam Diagnostics, emittance measurement techniques
||Emittance measurement with Quad magnet scan
||Mon, Mar 30
||Dispersion and Masking Techniques
||Beam masking techniques and bunch-train production
||Mon, Apr 06
||Advanced acceleration topics #2
||Demonstration of production of sub-femtosecond pulses and longitudinal profile measurements
||Mon, Apr 13
||Bunch compression; Coherent Synchrotron Radiation (CSR);
PHY542 2016 CSR_ATF2]
||CSR effects on energy spread demonstration (ATF control room or/and comp. lab. using
||Mon, Apr 20
Photo cathode QE characterization.
Solenoid scan. 4xBPM Emittance measurements.
||Mon, Apr 27
||Advanced acceleration topics #3
||Magnetic measurements (To be confirmed)
||Mon, May 04
RF linacs phase optimisation. Emittance measurements
Beam masking techniques
||Mon, May 11
Finals: Student presentations
||Transport of particle beams, magnets
Lecture PHY542 2016 Magnets
||Magnetic measurements. Finishing Simulation in Comp. Lab