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Xband technology. CLIC developments Xband FEL linac introduction [email protected] [email protected] [email protected] [email protected] W. Wuensch 21-1-2014. Xbox-1 Layout. Clockwise from top-left: Modulator/klystron (50MW, 1.5us pulse) Pulse compressor (250ns, ratio 2.8) DUT + connections

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slide1

Xband technology

W. Wuensch

21-1-2014

slide2

Xbox-1 Layout

  • Clockwise from top-left:
  • Modulator/klystron (50MW, 1.5us pulse)
  • Pulse compressor (250ns, ratio 2.8)
  • DUT + connections
  • Acc. structure (TD26CC)

Gallery

Bunker

slide3

100ns

200ns

250ns

150ns

Pulse: 50ns

100 MV/m

~2x10-5BrD/pulse

05.12.2013

~7x10-5BrD/pulse

XBOX1

Full-fledged CLIC accelerating structure TD26R05CC build by CERN is successfully processed in XBOX1 up to 107 MW/m unloaded accelerating gradient at 250 ns pulses . We have started now study of breakdown rate evolution at the fixed (100 MV/m) gradient.

CLIC

preparation of future test stands

Preparation of future test stands

N. Catalan Lasheras, I. Syratchev, G. Mcmonagl

CLIC project meeting 11.10.2013

slide6

Future Developments: XBOX-2

LLRF Board Fully Tested

Functional plan completed

PXI hardware purchased and

Software partially completed

CPI-XL5 tube fully conditioned at SLAC

slide7

Future Developments: XBOX-3

  • 4 turn-key 6 MW, 11.9942 GHz, 400Hz power stations (klystron/modulator) have been ordered from industry.
  • The first unit is scheduled to arrive at CERN in October 2014. The full delivery will be completed before July 2015.
energy target
Energy Target
  • What is the energy range at the end of the linac?
  • Is the maximum 0.07nm or 0.15nm?
  • Are the bunch parameters the same for different energies?
  • lower energy implies lower gradient (or additional extraction points)
  • lower gradient changes the longitudinal and transverse wakefield effects
    • either need more margin in linacwakefields
    • or need to only change gradient in Linac3, but have to check longitudinal effects
  • Need to understand operation at lower energy
  • Who finds out which range is required?

D. Schulte, CERN, October 2013

slide9

Electron linac RF unit layout based on the existing (industrialized) RF sources (klystron and modulator)

2x ScandiNova solid state modulators

2x CPI klystrons

410 kV, 1.6 s flat top

50 MW

1.5 s

(Operated

@45MW)

I. Syratchev,

modified by me

X 5.2

100 (90) MW

1.5 s

~11 m, 16.3 cm

TE01 transfer line (RF=0.9)

Inline RF distribution network

TE01 900 bend

Common vacuum network

Preliminary

468 MW

(418 MW)

150 ns

x 10 accelerating structures

@68.8MV/m (65MV/m)

46.8MV (41.8MW) input power

10 m, 7.5 active

This unit should provide ~516 (488) MeV acceleration beam loading.

Need 12 (12) RF units.

Cost 51.7 a.u., 4% more than optimum

D. Schulte, CERN, October 2013

slide11

Accelerating Structure

2 Coupl.

72 Cells

2 Regions for monitoring wakefields

slide12

Beam Compression

X-band OFF

X-band ON

300 A

600 A

Bunch temporal profiles with and without X-band

downstream BC1, using a [email protected] MeV.

Analysis on 50 shots

Courtesy of

S. Di Mitri

slide13

Present layout and proposed energy upgrade

  • FERMI current layout and performance
  • Ebeam up to 1.5 GeV
  • FEL-1 at 80-10 nm and FEL-2 at 10-4 nm
  • Seeded schemes
  • Long e-beam pulse (up to 700 fs), with “fresh bunch technique”

FEL-1 & FEL-2

beamlines

X-band linac extension

Beam input energy

≥ 750 MeV

  • Beam for a new FEL beamline
  • ≤ 1 nm

Operation with

short bunch (< 100 fs)

and low charge (< 100pC)

  • X-band energy upgrade
  • Space available for acceleration 40 m
  • Accelerating gradient @12 GHz60 MV/m
  • X-band linac energy gain 2.4 GeV
  • Injection energy .75 GeV
  • Linac output energy 3.15 GeV

~50 m available

40 m (80%)

available for acceleration

small aperture linac 2 4 gev 40m
Small aperture linac, 2.4 GeV, 40m

Constant Impedance Accelerating Structure

with input power coupler only

Klystron

Pulse compressor

RF load

Hybrid

P

C

middle aperture linac 2 4 gev 40m
Middle aperture linac, 2.4 GeV, 40m

Constant Impedance Accelerating Structure

with input power coupler only

Klystron

Pulse compressor

RF load

P

C

Hybrid

large aperture linac 2 4 gev 40m
Large aperture linac, 2.4 GeV, 40m

Constant Impedance Accelerating Structure

with input power coupler only

Klystron

Pulse compressor

RF load

Hybrid

P

C

clic and xfel study group@sinap

clic and xfel study [email protected]

Meng Zhang, Chao Feng, QiangGu

fel parameters the baseline
FEL parameters – the baseline
  • Achievable normalized emittance is used for few hundred pCbeam.
  • A permanent magnet in-vacuum undulator with 15mm period is used for the radiator
  • The radiator length is less than 80m with the PMU and could be shorter with the cryo-PMU
slide22

Baseline configuration

  • Compressing ratio = 12*8
  • Double horn at the current profile and the none linear chirp at the energy profile are due to the x band linearizer and the wake from the TWS

After BC1

Injector exit

Before BC1

Before BC2

After BC2

Linac exit

turkish fel projects and proposals

Turkish FEL Projects and Proposals

  • Turkish Accelerator and Radiation in Ankara (TARLA) Project
  • SASE FEL Proposal based on X-band accelerating structure

Avni AKSOY

Ankara University

Institute of Accelerator Technologies

tarla facility at institute of accelerator technologies of ankara university
TARLA facility at Institute of Accelerator Technologies of Ankara University

The institute which is only 2 years old is the first institute established as research in the fields of accelerators and related topics in Turkey

TARLA project which is essentially one of the sub-project of national project Turkish Accelerator Center (TAC) has been coordinated by Ankara University since 2006.

TARLA facility belongs to Institute of Accelerator Technologies of Ankara University (located in Gölbaşı), and it is supported by Ministery of Development

time table for xfel
Time table for XFEL

The preparation phase, including

the Conceptual Design Report (1 Year)

the Technical Design Report (~3-4 Years)

the development of the RF gun and

a klystron and 12 GHz test stand;

the construction of the injector (~2 years)

The construction of the X‐band acceleration section to 2.5 GeV (~2 years)

the construction of the final stage of X‐band acceleration to 5 GeV. (~2 years)

installation of undulator section(s) (~2 years)

conclusion
Conclusion

Turkey wants to fulfill the needs of accelerator and accelerator based technology inside country and its region within next 20 years..

Therefore three different light source project/proposal within TAC scope is (going to be) supported step by step..

Oscillator FEL (TARLA) under construction

Synchrotron Radiation based on 3 GeV ring (TDR phase)

SASE FEL project based on 5 GeV linac (CDR phase)

The support of CERN will be a big step towards our goals

We have a chanche to build SASE XFEL relatively cheaper by using x‐band structures..

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