Linacs hall 300 MeV driving electron linac Positron linac.

Презентация:



Advertisements
Похожие презентации
А.В.Акимов, А.Ю.Антонов, А.В.Антошин, П.А.Бак, А.М.Барняков, М.Ф.Блинов, Ю.М.Боймельштейн, Д.Ю.Болховитянов, Ф.А.Еманов, А.Р.Фролов, Р.Х.Галимов, С.М.Гуров,
Advertisements

Albina Manapova ED There is great variety in the types of speakers that are available in the market today. However, the basic principles of sound.
The reconstruction of coding scheme through errors distributions Lyakhovetskii V.A., Karpinskaya V.Ju*, Bobrova E.V. Pavlov Institute of Physiology of.
Capacitance. Capacitance is the ability of a body to store an electrical charge. Any body or structure that is capable of being charged, either with static.
Vortex lattice in presence of weak periodic pinning potential W. V. Pogosov and V. V. Moshchalkov Laboratorium voor Vaste-Stoffysica en Magnetisme, K.
7/23/2015 1:07:26 AMPulsed NMR by Dr.S.Aravamudhan 1 P -X π/2 At t =0, the end of pulse External Magnetic Field Chemical substance Spin ensemble Z X Y.
1 On A Laboratory, Magnetic Resonance Experimental Set up This is an Animated feature Viewable ONLY with the MS PowerPoint XP Version. Other versions.
Recent advances in intercalation compounds physics.
GALAXIES IN THE FIELD OF THE GAMMA-RAY BURST GRB I.V. Sokolov, Yu.V. Baryshev, T.A. Fatkhullin Results (counts of galaxies, photometric red shifts,
>> Presentation scapacs401>> Page: 1 >> scapacs401 Modular System For Laser Processing Heads.
Z-direction 100 MHz Electro- magnet/Permanent magnet Systems Supercon magnet systems above 100MHz up to 900MHz as known currently Magnet Current source.
ELECTRONIC DEVICES AND CIRCUITS Faculty: 1.Shaik.Jakeer Hussain 2.P.Sandeep patil 3.P.Ramesh Babu.
7/23/20151 Relativistic electron beam transport simulation models German Kurevlev.
Diffraction and Interference. Interference and Diffraction Distinguish Waves from Particles O The key to understanding why light behaves like waves is.
NMDB Kiel Meeting, 3-5/12/2008 On the possibility to use on-line one-minute NM data of NMDB network and available from Internet satellite CR data for.
1 Molecular reactor Faraday Lab Ltd. 2 Goals Development of scientific conception presented by Irving Longmuir 80 years ago. Investigation of hydrogen.
O O O O O O H H Proton Site with σ intra Organic Molecular single crystal : a specimen of arbitrary shape 4 point star indicates the molecule at a central.
1 Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian Snake Yu.N. Filatov 1,3, A.D. Kovalenko 1, A.V. Butenko 1, A.M.
PAT312, Section 10, December 2006 S10-1 Copyright 2007 MSC.Software Corporation SECTION 10 DISPLAY.
7/23/2015 1:08:36 AMInno Course Contents1 For the Quantization Effects on the Spin Angular Momentum in presence of External magnetic Field VIEW the powerpoint.
Транксрипт:

Linacs hall 300 MeV driving electron linac

Positron linac

Conventional positron production system layout. 1 electron source, 2 RF accelerating structure, 3 triplet of quadrupoles, 4 positron production target, 5 matching device, 6 first accelerating structure of positron linac, 7 quadrupole lens.

Positron system testing : 1 electron gun, 2 sub harmonic bunching system, 3 focusing coil, 4 accelerating structure, 5 solenoid coil, 6 quadrupole lens, 7 corrector, 8 spectrometer, 9 bending magnet, 10 positron production system and first accelerating structure of positron linac.

Positron bunch profile at different moments of time. Results of simulation.

Phase space diagrams for positron beam (black contour lines): a) just after the target, b) after the matching device. White zone corresponds to the acceptance of further linear accelerator. These results of simulation were obtained for axial-symmetric magnetic field of matching device:

Results of magnetic measurements for matching device of VEPP-5 Injection Complex: upper curve – longitudinal magnetic field on the geometrical axis of the device, lower curve – transverse component of magnetic field on the geometrical axis Z.

Examples of positron trajectories in matching device with axial symmetry of magnetic field:

Positron production test bench: 1 main DC solenoid, 2, 3, 4 quadrupole lenses, 5 steering magnet, 6 separating magnet. Positron beam intensity as a function of distance from the target in the positron production test bench. Designed positron beam intensity at the end of linac.

VEPP-5 positron production system assembly. FC magnet Movable positron target e - Pulsed shifting magnet HV feedthrough for FC magnet First cell of acc. structure

Positron production system of Injection complex

Positron production target assembly.

VEPP-5 FC magnet

The dependence of positrons number upon the maximum field in FC. Driving electron beam energy MeV. Number of electrons in primary electron beam - Y=0.1 1/GeV

Рис. CCD. Изображение на люминофоре PositronsElectrons

Damping ring

SR light from damping ring (electrons, 300 MeV)

Injection and extraction of 300 MeV electron beam. Electron beam before DR.Electron beam after DR.

Transverse positron beam sizes in 500 MeV linear accelerator of VEPP-5 Injection complex. Simulations were done using ELEGANT code. Positron bunch intensity in positron linac as a function of distance from positron production target simulations were done using ELEGANT code.

e + e - Damping ring with injection and extraction channels e + e -

Present status and plans: Positron production system was successfully tested at designed parameters. Damping ring is ready for commissioning with 500 MeV electron beam. 500 MeV electron beam will be available from linac in December MeV positron beam will be available from linac in 2009.

Isochronous achromatic U-turn of electron beam: 1 phosphor screen, 2 focusing triplet, 3 Faraday cup, 4 positron target, 5 quadrupole lens, 6 bending magnet.

Bypass scheme for electron beam Movable positron production target holder.

Scheme of VEPP-5 matching device. Arrows show the surface current directions. 1 water cooling channels; 2 vacuum insulating gap (gap width is 0,2 мм); 3 primary coil; 4 positron production target, 5 input aperture of the first accelerating structure.

Schematic surface current distributions (i) on the one of the surfaces of insulating gap (3) for two different variants of matching magnet design: a) with big transverse component of magnetic field on the axis, b) with small transverse component of magnetic field on the axis. Different length of primary coil (2) and conical cavity (4) helps to reduce the magnetic field asymmetry.

Рис. Distrib. Энергетическое (а) и угловое (б) распределение позитронов, родившихся в конверсионной мишени. Спектры получены с помощью программы GEANT […] (кол-во падающих на мишень электронов 2·10 5, энергия электронов 280 МэВ, длина танталовой мишени 12 мм). Общее число вышедших из мишени позитронов 2,4·10 5 (расхождение с формулой 2 объясняется тем, что приблизительно половина родившихся в ливне позитронов анигилирует внутри мишени). Спектры слабо зависят от энергии первичного электронного пучка

Distribution of transverse momentum for positrons at the target exit. This distribution obtained by GEANT code for 12 mm length of tantalum target, 280 MeV of incoming electron beam energy. For 2·10 5 electrons in the bunch, the number of positrons produced at the exit from the target is equal to 2,4·10 5. This distribution has a weak dependence upon the incoming electron beam energy.

Phase space plot for positron beam at the exit of solenoid. White area corresponds to acceptance of solenoid. (Results of simulation for typical parameters of VEPP-5 Injection Complex). Horizontal momentum distribution for positrons: a) at the beginning of solenoid, b) at the solenoid exit. Results of simulation for typical parameters of VEPP-5 Injection Complex.

Positron system with first accelerating structure. 1 positron production target, 2 DC solenoid, 3 AMD, 4 DC coil, 5 main solenoid external coil, 6 main solenoid internal coil, 7 accelerating structure, 8 matching quadrupole, 9 ion pump, 10, 11 steel girder, 12 support.

Accelerating structure. 1 regular cell, 2 RF coupling device 3 joint cell, 4 joint diaphragm, 5 stainless steel frame. 1

Detector of electron and positron beams.

Standard element of accelerating system: 1 quadrupole lens, 2 accelerating structure, 3 girder, 4 ion pump, 5 support.