1986 Linear Accelerator Conference at SLAC
1 . Proton and ェon Linac Topics
S. Fukumoto
National Laboratory for High Energy Physics
Oho, Tsukuba, Ibaraki, 305

Abstract
Topics on proton and ion linacs of the 1986 Linear Accelerator
Conference are briefly described with a list of all invited review
t a l k s . Presentations on the electron linac and related topics exceededthat on the proton and ion linac in number.

The 1986 Linear Accelerator Conference was held on June 2 - 6 at
SLAC (Stanford Linear Accelerator C e n t e r ) • The Conference chairman wasDr. G.A. Loew.
More than 300 attended it.
Japanese participants wereM. Oyamada of Tohoku U. , I. Sato, J. Tanaka and S. Fukumoto of KEK,H. Takekoshi and Y. Iwashita of Kyoto U. , H. Iyeki of MELCO, N,
Terabayashi and F, Okubo of MHI and M. Odera and T. Hori of SHI.
All
review talks and invited papers were orally presented.
Contributedpapers were presented by posters although some of them were introduced
orally in five m i n u t e s . All posters were exhibited outdoors.
Lists of the invited talks a r e :MOl-1M01-2

History of Proton Linear Accelerators, L,W. Alvarez, LBL
Induction L i n a c s , R.J. B r i g g s , LLNL

M02-1

Control of Beam Dynamics in High Energy Induction
L i n a c s , G.J. C a p o r a s o , LLNL
Linacs for Esoteric A p p l i c a t i o n s , R,A, Jameson, LANLRF Power Sources for 1990 and Beyond, D.W. Reid, LANL
Linacs for Medical and Industrial Applications,
R.W. Hamm, AssSys Technology, Inc.

M02-2
M02-3
M02-4

TUI-1
TUI-2

TU2-1
TU2-2
TU2-3
TU2-4

WEI-1
WEI-2
WEI-3

Highlights of the Heavy Ion Fusion Symposium D. Keefe,
LBL
High-Current Beam Dynamics and T r a n s p o r t , Theory andE x p e r i m e n t , M, Reiser, Univ, of Maryland (1 hour)
Emittance Growth, I. Hofmann, GSI, Darmstadt
Recent Developments in RF Superconductivity for Linac
S t r u c t u r e s , H. L e n g e l e r , CERNThe CEBAF Superconducting Accelerator - An Overview,
C.W. Leemann, CEBAF
Comparison of S t and ing-Wave and Traveling-Wave Linacs,
R.H. Miller, SLACSLC Progress Report, J. Rees, SLAC
Special SLC Linac Developments, J,T. Seeman, SLAC
Advanced Technology Recently Developed at KEK for Future
Linear Colliders, J, T a n a k a , KEK

WE2-1
WE2-2
WE2-3
WE2-4

R F Q !s in Research and Industry, J. S t a p l e s , LBL
Innovations in Ion Sources and Injectors, R, Keller,GSI, Darmstadt
Progress in the Development of H Ion S o u r c e s s
K. Prelec, BNL
RF Cavity Design and C o d e s , T, W e i l a n d , DESY

TH1-1
TH1-2TH1-3

The Two-beam Accelerator, A.M. S e s s l e r , LBL
Progress on Plasma Accelerator, P. Chen, SLAC
Wake field Accelerators, G.A, Voss, DESY
(Presented by T, Weiland)

TH 2 - 1
TH2-2
TH2-3

Magnet Innovations for Linacs, K. Halbach, LBL
Electron Linac Injector Developments, J,S. Fraser, LANL
Linacs for Microtrons and Pulse S t r e t c h e r s ， S • P e n n e r ,NBS
Production of Intense Low Emittance Beams for Free
Electron Lasers Using Electron Linear A c c e l e r a t o r s ，T.I. Smith, Stanford Univ.

TH2-4

FR1-1
FR1-2

FR2-1
FR2-2

Future e e Linear Colliders and Beam-Beam E f f e c t s ，P.B, Wilson, SLAC
Factors Limiting the Operation of Structures under HighG r a d i e n t , S.O, S c h r i b e r , LANL
Collider Constraints in the Choices for W a velength andGradient S c a l i n g , J.D. Lawson, RAL
High Energy Physics and Future Very High Energy
A c c e l e r a t o r s ， B. Richter, SLAC
Suiranary of the Conference, N. Angert

At the beginning of the Conference, L. Alvarez of LBL disclosedthat the mechanical design of his first "Alv a r e z ” linac started in 1945
and its first b e a m was accelerated in 1947. His ne w idea was so q u i c k ­ly proved.
At the end of the C o n f e r e n c e ， N. Angart of GSI, the chairman of
the Darmstadt Conference, pointed out that although the Linac Con f e r ­ence started as the Proton Linac Conference in 1 9 6 1 3 this Conference
has following two distinct f e a t u r e s :1 ) more electrons than protons 92) high energy accelerators are included.
Behavior of the induction linac is better understood,’’
Es o t e r i c ”
means 1 ) mysterious, strange, 2) intended for or understood by only asmall group, 3) difficult to understand, abstruse, 4) not publicly
disclosed, confidential.
The object is a 50 MeV proton (H ) linac toproduce neutral be a m of SDI. A laser channel wo r k e d as a b e a m channel.
There are about 2500 medical electron linac in the w o r l d 。 RF sources
are becoming cheeper but more stable and n e w s o u r c e s ， such as lasertronand relativistic klystrons, are being developed.
A high energy induction linac is being built for the heavy ion
fusion. High current bea m transport is theoretically and e x perimental­
ly treatedDistribution of the b e a m changes drastically along thebeam line.
Estimation of emittance growth is p r e s e n t e d • Superconduct­ing RF cavity accelerates electrons with 5 〜 10 MV/ m f i e l d s , and CEBAF(Continuous Electron Beam Accelerator Facility) will be equipped withsuperconducting RF c a v i t i e s •Design of R F Q Ts are becoming simpler.
M E W A (Metal Vapor VacuumArc) source can produce high intensity heavy ion b e a m s • Magnetron,Penning, semi-pianotron and multicusp sources are developed or used inroutine operation for H beams.
They are surface production sources
with cesium. Several volume production sources are being developed in
the world.
Among them, the Nagoya sheet plasma source is unique andinterestingン
Permanent quadrupole magnets are more compact than electric o n e s •Variable strength permanent quadrupole magnet is possible.
Since lastyear, an Alvarez linac with permanent quadrupole magnets has worked inJapan.
Plasma acceleration was demonstrated experimentally in Canada.
A microwave power of 1.8 GW was produce by FEL (Free ElectronLaser) and 180 MV/m was attained by a small accelerating tube with adiameter of 1 〜 2 cm at LLNL.
It was handed on to the audience.
The Conference includes more computer w o r k s ， new and exotic
schemes of acceleration such as FEL, induction linac or plasma
acceleration,and less practical informations compared with thisMeeting.
There was neither presentation on the SSC injector nor thaton the European Hardron Facility injector.
The next Conference will be held in 1988 at CEBAF in Virginia.