Novosibirsk Free Electron Laser Unique Source of the Terahertz and - - PowerPoint PPT Presentation

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Novosibirsk Free Electron Laser Unique Source of the Terahertz and - - PowerPoint PPT Presentation

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Budker INP, Novosibirsk, Russia Novosibirsk Free Electron Laser Unique Source of the Terahertz and Infrared Coherent Radiation Presented by O.A. Shevchenko, BINP SFR-2016, 47 July 2016, Novosibirsk, Russia Budker INP, Novosibirsk,

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SLIDE 1

Budker INP, Novosibirsk, Russia

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Presented by O.A. Shevchenko, BINP

Unique Source of the Terahertz and Infrared Coherent Radiation Novosibirsk Free Electron Laser

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SLIDE 2

V.S.Arbuzov, N.A.Vinokurov, P.D.Vobly, V.N.Volkov, Ya.V.Getmanov, I.V.Davidyuk, O.I.Deychuly, E.N.Dementyev, B.A.Dovzhenko, B.A.Knyazev, E.I.Kolobanov, A.A.Kondakov, V.R.Kozak, E.V.Kozyrev, V.V.Kubarev, G.N.Kulipanov, E.A.Kuper, I.V.Kuptsov, G.Ya.Kurkin, S.A.Krutikhin , L.E.Medvedev, S.V.Motygin, V.K.Ovchar, V.N.Osipov, V.M.Petrov, A.M.Pilan, V.M.Popik, V.V.Repkov, T.V.Salikova, I.K.Sedlyarov, S.S.Serednyakov, A.N.Skrinsky, S.V.Tararyshkin, A.G.Tribendis, V.G.Tcheskidov, K.N.Chernov, M.A.Scheglov, O.A. Shevchenko

Budker INP, Novosibirsk, Russia

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Project participants

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SLIDE 3

Budker INP, Novosibirsk, Russia

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

  • Brief introduction to the FEL physics
  • The NovoFEL accelerator design and operation
  • NovoFEL as three FELs based source of radiation
  • The third FEL commissioning and first experiments
  • Nearest and far future plans for the conclusion

Outline

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SLIDE 4

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

FEL principle of operation

x xV

mc e dz d

ε

γ

3

=         + ≈ 2 1 2

2 2

K

w

γ λ λ

synchronisme condition which is necessary for the energy transfer

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SLIDE 5

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

FEL principle of operation

  • 3
  • 2
  • 1

1 2 3

  • 0,3
  • 0,2
  • 0,1

0,0 0,1 0,2 0,3

Gain, a.u. δω/ω

◊, 1/Nw

Equivalent scheme

( )

ω G

noise

FEL oscillator

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SLIDE 6

Energy Recovery Linac

1 – injector, 2 – linac, 3 – bending magnets, 4 – undulator, 5 –dump

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

NovoFEL Accelerator Design

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Accelerator is the most important part of any FEL. ERL is the best choice for high power FEL.

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SLIDE 7

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

NovoFEL Accelerator Design

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Energy Recovery Linac

1 – injector, 2 – linac, 3 – bending magnets, 4 – undulator, 5 –dump

Accelerator is the most important part of any FEL. ERL is the best choice for high power FEL.

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SLIDE 8

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

NovoFEL Accelerator Design

Gun Injector

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SLIDE 9

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

NovoFEL Accelerator Design

Gun Injector Main linac Dump

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SLIDE 10

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Gun Injector Main linac The first THz FEL undulator sections Dump

NovoFEL Accelerator Design

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SLIDE 11

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Gun Injector Main linac The second FEL undulator The first THz FEL undulator sections Dump

NovoFEL Accelerator Design

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SLIDE 12

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

NovoFEL Accelerator Design

Gun Injector Main linac The first THz FEL undulator sections The second FEL undulator The third IR FEL undulator sections Dump

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SLIDE 13

2nd stage FEL undulator Main linac Horizontal tracks 1st stage FEL undulator

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SLIDE 14

3d stage FEL undulator

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SLIDE 15

Budker INP, Novosibirsk, Russia

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

825 3x725=2175 2090 700 1175 1450 1100 900 900 1100 71 71 900 1100 2000 280 %%c110 100 3000 1175 700 71 2000 %%c180 235 71 1100 2100 L}5 L}4 L}3 @R@F@G0 AM@S0 0@R@F@DR 0@R@F@GS@R @R@F@G3 @R@F@G2 @R@F@G1 @R@F@G5 @R@F@G4 @L@VR@S0 @L@VR@S1 @L@VR@S2 @L@VR@S4 @L@VR@S6 1@R@F@DR AM@S2 SP-111 0@R@FS@R1 2@R@F@DR SP-111A ЩПР1-3 }S-0 1200 1300 Pol sohranit[ 1150 5450+15 1150 725 625 680 990 2577 2880 3210 349 1250 800 kran-balki Zona OU-5 OU-5 OU-5

User Stations (ground and first floors) r-recuperator and ron laser (basement level) stem r) Control room (ground floor) Beamlines for radiation transport

B G 1st 120 m

Siberian Center of Photochemical Research

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SLIDE 16

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Layout of Injector, Main Linac and Vertical Beamline (the First ERL)

1 – electron gun 2 – bunching cavity 3 – focusing solenoids 4 – merger 5 – main linac 6 – focusing quadrupoles 7 – magnetic mirror 8 – undulator 9 – phase shifter 10 – optical cavity 11 – calorimeter 12 – beam dump

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SLIDE 17

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Electrostatic Gun

Power supply:

Umax = 300 kV Imax = 50 mA

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SLIDE 18

Measured beam parameters Energy, KeV 100 ÷ 320 Pulse duration(FWHM), ns ≤ 0.6 Bunch charge, nQ 0.3 ÷ 1.5 Repetition rate, MHz 0.01 ÷ 90 Average current, mA 102 max

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

575 пс

RF Gun Test Setup

  • Dr. Vladimir Volkov

“New RF gun for Novosibirsk ERL FEL” 05 July, 16:00-17:00, Board 059

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SLIDE 19

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Injector

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SLIDE 20

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

RF Gun Installation Layout

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SLIDE 21

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Main Linac

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SLIDE 22

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

RF Power Supply

Frequency, MHz 180.4 Power, MW 2 x 0.6

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SLIDE 23

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

New Amplifier for the Bunching Cavity

f = 180 MHz, efficiency = 52 % PIN = 1 W, POUT = 5 kW 8 transistors NXP BLF188XR water cooling

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SLIDE 24

Injector Beam dump

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

42 MeV 32 MeV 22 MeV 12 MeV

90% of beam current comes to the dump, the working repetition rate 3.75 MHz and average current 3.2 mA are obtained 22 May 2012 – the first time the beam reached the dump after four accelerations and four decelerations Only about 3% of beam current is lost with energy > 12 MeV Less than 1% of beam current is lost at the last track

Layout of Horizontal Beamlines (the Second and the Third ERLs)

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SLIDE 25

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Magnets and Vacuum Chamber of Bends

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SLIDE 26

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Beam trajectory can be adjusted only before this point

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SLIDE 27

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Compact 13.5-nm free-electron laser for extreme ultraviolet lithography

Y.Socol, G.N.Kulipanov, A.N.Matveenko, O.A.Shevchenko and N.A.Vinokurov, FEL10

40 m Injector

RF2

AB AB Booster Dump

RF1

With 10-T superconducting magnet it may be used to generate 20-fs periodic x-ray pulses, which are necessary for time-resolved experiments, which use femtoslicing technique at storage rings now. But, the number of useful photons is thousands times more.

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SLIDE 28

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

The most attractive ranges for FELs are at very short and at very long wavelength, where there are no

  • ther lasers

NovoFEL X-ray FELs

NovoFEL as Radiation Source

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SLIDE 29

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Variable period undulator Variation of undulator period Variation of beam energy Variation of magnetic field Variable gap undulator Electromagnetic undulator One of the main FEL advantages is the ability to adjust the wavelength

        + = 2 1 2 1

2 2

K

u

γ λ λ

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K ~ 0…1.5

cm

u

12 = λ cm

u

6 = λ

K ~ 0.4…2.5

cm

u

6 . 9 ... 8 . 4 ~ λ

K ~ 0.42…1.79 E1 ~ 10…13 MeV E2 ~ 20…24 MeV E3 ~ 40…46 MeV

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SLIDE 30

1-st FEL 2-d FEL Period, cm 12 12 Maximum current, кА 2.4 2.4 Maximum K 1.25 1.47

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Electromagnetic Undulators

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SLIDE 31

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Variable Period Undulator (for the 2-d FEL)

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The tunability range of the 2-d FEL will be increased from 37 - 80 to 15 - 80 microns

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SLIDE 32

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Variable Period Undulator (for the 2-d FEL)

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SLIDE 33

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

FEL Optical Cavities

1-st FEL 5.64 MHz ~ 100 ps 2- d FEL 7.52 MHz ~ 50 ps 3- d FEL 3.76 MHz ~ 15 ps

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SLIDE 34

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Optical beamlines and user stations

  • Prof. Boris Knyazev

“Novosibirsk free electron laser as a user facility” Wednesday, 06 July, 09:40

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SLIDE 35

The 1st stage FEL radiation parameters

The obtained radiation parameters are still the world record in terahertz region.

  • Radiation wavelength, microns

90 - 240

  • Minimum pulse duration, ps

70

  • Repetition rate , MHz

5.6 / 11.2 / 22.4

  • Maximum average power, kW

0.5

  • Minimum relative linewidth (FWHM)

3⋅10-3

  • Maximum peak power, MW

1

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SLIDE 36

Injector Beam dump

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Electron outcoupling scheme may be used here

The Third FEL Design and Commissioning

~ 40 m

FEL radiation

e- e-

Undulator 1 (energy modulation) Undulator 2 (radiation)

B1 B2 Q1 Q2

Undulator 3 (power limitation)

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SLIDE 37

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

The third FEL undulator

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SLIDE 38

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

The third stage FEL undulator λw 6 cm K 0.4 – 2.5

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SLIDE 39

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

  • Align mirrors of 40 meters long optical cavity

and adjust the distance between them with accuracy better than 0.3 mm

  • Obtain high recovery efficiency in multiturn

ERL

  • Adjust the beam trajectory in undulator with

submillimetric accuracy First lasing

Challenges

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SLIDE 40

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

When it’s done all that remains is to adjust RF frequency and watch carefully First lasing

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SLIDE 41

Sygnal from pyroelectric sensor

6 July 2015 – the first lasing

Beam current in the dump

0.2209

RF frequency

180.40094

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 41/50

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SLIDE 42

RF frequency Beam current in the dump Sygnal from pyroelectric sensor

6 July 2015 – the first lasing It’s lasing !!!

Beam current in the dump

0.2160 180.40109

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 42/50

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SLIDE 43

First experiments with 3rd stage FEL Drilling holes in plexiglass

Radiation power was about 30 watts Wavelength 8.96 µm

FEL radiation

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 43/50

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SLIDE 44

λ = 8.96 µm

First experiments with new FEL Measurement of the radiation wavelength

grating

λ = 8.96 µm

grating

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 44/50

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SLIDE 45

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

International Tomography Center SB RAS

2600 2800 3000 3200 3400 3600 3800

  • 0,3
  • 0,2
  • 0,1

0,0 0,1 0,2

Signal Intensity / a.u. Magnetic field / Gs Before 9,3 um radiation After 9,3 um radiation

Influence of IR-light to the spin state of photoswitchable copper(II)-nitroxide magnetoactive compound Cu(hfac)2LPr

8,0 8,2 8,4 8,6 8,8 9,0 9,2 9,4 9,6 9,8 10,0 0,0 0,1 0,2 0,3 0,4 0,5 0,6

Light intensity / a.u. Wavelength / um

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

IR spectra of Cu(hfac)2LPr EPR spectra of Cu(hfac)2LPr

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SLIDE 46

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Electron beam and radiation parameters

1st 2nd 3d Energy, MeV 12 22 42 46 Current, mA 30 10 3 50 Wavelength, µm 90-240 37-80 8-11 5-20 Radiation power, kW 0.5 0.5 0.1 5 Electron efficiency, % 0.6 0.3 0.2 0.5

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SLIDE 47
  • Optical (SR) diagnostics of electron beam parameters
  • Decrease beam losses and increase average current
  • Increase DC gun voltage and improve beam quality in

injector

  • Optimize electron efficiency of FEL
  • Improve x-ray and neutron radiation shielding
  • Install RF gun

SFR-2016, 4–7 July 2016, Novosibirsk, Russia

Nearest and far future plans

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SLIDE 48
  • Selective photochemical reactions
  • Infrared laser catalysis
  • Separation of isotopes
  • …

Nearest and far future experiments

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 48/50

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SLIDE 49

Overview of the NovoFEL facility

  • The first stage of Novosibirsk high power free electron

laser (NovoFEL) based on one track energy recovery linac (ERL) working in spectral range (90 – 240) µm was commissioned in 2003.

  • The second stage of NovoFEL based on two track energy

recovery linac, working in spectral range (37 – 80) µm, was commissioned in 2009.

  • The third stage of NovoFEL based on four track energy

recovery linac was commissioned on July of 2015. Spectral range now is (8-11) µm. Radiation is available for users.

SFR-2016, 4–7 July 2016, Novosibirsk, Russia 49/50

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SLIDE 50

Thank you for your attention!

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SLIDE 51

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