UVSORの現状 の現状と と UVSOR 小型施設から眺めたSPring SPring- -8 8 小型施設から眺めた 加藤政博 加藤政博 自然科学研究機構・分子科学研究所 自然科学研究機構・分子科学研究所 総合研究大学院大学・物理科学研究科 総合研究大学院大学・物理科学研究科 名古屋大学大学院・工学研究科 名古屋大学大学院・工学研究科 高エネルギー加速器研究機構・物質構造科学研究所 高エネルギー加速器研究機構・物質構造科学研究所
History of History of UVSOR Accelerators UVSOR Accelerators 1981 Start of Construction 1983 Commissioning of Storage Ring 1984 Installation of Undulator and Wiggler UVSOR 1986 Start of Free Electron Laser FEL 1 st Lasing (456 nm) 1993 1996 Installation of Helical Undulator/ Optical Klystron FEL Lasing at 239 nm (World Record) 2001 FEL Output Power 1.2W (World Record) 2002 Installation of 1st in-vacuum Undulator 1 st FEL Users Experiment 2003 Reconstruction to UVSOR-II Installation of 2 nd In-Vacuum Undulator Commissioning of UVSOR-II 2004 New RF Cavity 2005 Reinforcement of Radiation Shield UVSOR-II Start of Laser Bunch Slicing/ CHG 2006 Energy Upgrade of Booster Synchrotron Installation of 2 nd Variably Polarized Undulator 2007 Energy Upgrade of Beam Transport Line Start of Full Energy Injection 200X Start of Top-up Operation
JASRI and Small Small Big and Big
UVSOR Accelerators UVSOR Accelerators 600MeV Booster 750MeV Storage Ring Synchrotron 750MeV in summer 2006 15MeV Linac 30m
Electron Gun & Linear Accelerator Electron Gun & Linear Accelerator ＜ ＜ Partly Upgraded during the UVSOR II project ＞ ＞ Partly Upgraded during the UVSOR- -II project New Electron Gun New Electron Gun � � = > short pulses for single bunch injection, better emittance and energy spread energy spread = > short pulses for single bunch injection, better emittance and New Klystron Pulse Modulator New Klystron Pulse Modulator � � = > better energy stability (pulse to pulse) = > better energy stability (pulse to pulse) New Water Cooling System = > smaller energy drift � New Water Cooling System � = > smaller energy drift After the upgrade, the injection efficiency to the booster has increased by a factor of 3.
Booster Synchrotron Booster Synchrotron No Change during the UVSOR- -I I project, to make the com I I project, to make the comm missioning period shorter issioning period shorter No Change during the UVSOR Energy Upgrade in 2006 to realize Full- -energy I njection & Top energy I njection & Top- -Up injection Up injection Energy Upgrade in 2006 to realize Full ７５０ MeV
UVSOR before Upgrade UVSOR before Upgrade （ UVSOR I ） ） （ UVSOR- -I Emittance= 160nm-rad Straight Sections= 3m x 4 Variable Polarization Undulator (Hor./Hel.) /Optical Klystron for FEL Linear Undulator Super- conducting Wiggler
Upgrade of UVSOR Accelerators Upgrade of UVSOR Accelerators 2003 Proposed in 2000 and funded in 2002 Upgrade of Magnetic Lattice Emittance M. Katoh et al., NIM A 467-468 (2001), 68-71 160nm-rad = > 27nm-rad Straight Sections 3mx4 = > 4mx4+ 1.5mx4 New Undulators UVSOR ＝＞ UVSOR-II 2005 Upgrade of main RF cavity V rf = 46kV = > 150 kV 2006 Energy Upgrade of Booster Synchrotron Installation of new undulator Reinforcement on Radiation Shield = > Top-Up Operation ・・・・・・・・・
Upgrade of Magnetic Lattice Upgrade of Magnetic Lattice low- ε , more straight sections, low- β y at s.s. UVSOR-I I UVSOR-II low- ε low- β non-achromatic optics ( ε x0 =27.4nm-rad): One quadrant of the ring 25 β UVSOR-II 20 x β x [m] y 27nm-rad 10* η 15 x x,y , 10* η 10 β UVSOR-I 5 0 0 2 4 6 8 10 12 s [m] UVSOR optics ( ε x0 =160nm-rad), 1997-2003: One quadrant 25 UVSOR-I β 20 x x [m] β y 160nm-rad 10* η 15 x x,y , 10* η 10 β 5 0 Quadrupole/Sextupole Quadrupole/Sextupole 0 2 4 6 8 10 12 s [m] Combined- -function Magnet function Magnet Combined for new Lattice for new Lattice
Vertical Aperture Limit Vertical Aperture Limit Vertical Aperture Limit of UVSOR-I Vertical Aperture Limit of UVSOR-II 30 30 25 25 Vertical Aperture [mm] Vertical Aperture [mm] BQ-duct BQ duct BQ-duct BQ-duct BQ-duct BQ-duct 20 20 (half-width) (half-width) 15 15 10 10 Aperture Limit for Undulators 5 5 Aperture Limit for Undulators 0 0 0 5 10 15 20 25 0 5 10 15 20 25 s [m] s [m] UVSOR-I UVSOR-II One half of the ring is shown. One half of the ring is shown.
UVSOR- -I just before the I just before the reconstruction reconstruction UVSOR （ March, 2003 ） （ March, 2003 ）
→ UVSOR I → UVSOR- -I UVSOR- -I I I I UVSOR （ April, 2003 ） （ April, 2003 ）
UVSOR- -II just after the reconstruction II just after the reconstruction UVSOR （ July, 2003 July, 2003 ） ） （ The reconstruction was completed within three months.
Commissioning of UVSOR- -I I I I Commissioning of UVSOR Commissioning of UVSOR-II was completed within two months. Vacuum Conditioning of UVSOR-II 27nm-rad 190nm-rad
New RF Cavity New RF Cavity Old Cavity New Cavity installed in 2005 Frequency Frequency 90.1 MHz 90.1 MHz Frequency Frequency 90.1 MHz 90.1 MHz RF Voltage 55 kV (Routine) RF Voltage 150 kV ~ 200 kV RF Voltage 55 kV (Routine) RF Voltage 150 kV ~ 200 kV Ω 500 k Ω 2.9 M Ω Ω ( ( Superfish Shunt Impedance Shunt Impedance Shunt Impedance 500 k Shunt Impedance Superfish) ) 2.9 M Quality Factor Quality Factor 8000 (Unloaded) 8000 (Unloaded) Quality Factor Quality Factor 23800 (Unloaded, 23800 (Unloaded, Superfish Superfish) ) Cavity Structure Re- -entrant entrant × × 1 1 Cavity Structure Re- -entrant entrant × × 1 1 Cavity Structure Re Cavity Structure Re Diameter and Length (1000 mm, 420mm) Diameter and Length (964 mm, 400mm) Diameter and Length (1000 mm, 420mm) Diameter and Length (964 mm, 400mm) Material Material SUS + Copper SUS + Copper Material Material Copper Copper τ Touschek τ Touschek · τ · τ 1650 mA mA · H 5200 mA mA · H I I · 1650 · H I I · 5200 · H Touschek ( (multibunch multibunch) ) (multibunch multibunch) ) Touschek (
Electron Energy 750 MeV UVSOR- - I I I I Nov. 2 0 0 6 UVSOR Nov. 2 0 0 6 Emittance 27nm-rad Straight Sections 4mx4+ 1.5mx4 Filling Beam Current 350 mA (multi-bunch) Injection Interval 6 hours Reserved for Future Undulator 1m In-vacuum Undulator 2.3 m Variably Polarized Undulator 3m Variably Polarized Undulator 2m In-vacuum Undulator Reserved for Future Undulator New RF Cavity 3 rd Harmonic installed in 2005 Cavity
UVSOR-II BL5U Variavle Polarization Undulator/ Optical Klystron Number of periods 18 Period length 110 mm Length of dispers. part 302.5 mm Total Length 2351.2 mm Remanent field 1.3 T Magnetic gap 30–150mm Deflection parameter (K) (helical mode) 0.07 – 4.6 (linear mode) 0.15 – 8.5 9 periods Dispersive Section Upstream 9 periods installed in 1996 Downstream
UVSOR-II BL6U In-Vacuum Undulator Magnet Type Pure Permanent (Nd-Fe-B) Remanent Field 1.17 Tesla Period Length 36 mm Number of Periods 26 Magnetic Length 936 mm Overall Length 1.4 m (flange to flange) Pole Gap 8 – 40 mm Polarization linear (horizontal) installed in 2002
UVSOR- -I I BL3U I n I I BL3U I n- -vacuum Undulator vacuum Undulator UVSOR Magnet Type Pure Permanent (Nd-Fe-B) Remanent Field 1.17 Tesla Period Length 38 mm Number of Periods 50 Magnetic Length 1900 mm Overall Length 2.4 m (flange to flange) Pole Gap 8 – 40 mm Polarization linear (horizontal) installed in 2 0 0 3 installed in 2 0 0 3
BL7U Variable Polarization Undulator BL7U Variable Polarization Undulator BL7U Undulator BL6U Undulator Configuration APPLE-II Polarization Hor/Ver/Helical Number of periods 40 Period length 76 mm Total Length 3040 mm Remanent field 1.3 T Magnetic gap 24 – 200 mm Deflection parameter (K) (horizontal mode) max. 5.4 (vertical mode) max. 3.6 (helical mode) max. 3.0
-I I I I SR Spectra of UVSOR- SR Spectra of UVSOR
Ｕ p Operation at UVSOR - Ｕ Top- p Operation at UVSOR- -II II Top 400 Beam Current (mA) 040625 300 200 100 0 9:00 13:00 17:00 21:00 Time (hh:mm) Reinforcement of Radiation Shielding (2005-2006) Energy Upgrade of Booster Synchrotron by replacing Magnet Power Supply in 2006
at UVSOR-II Beamlines
In- -vacuum Undulator Beamline BL3U vacuum Undulator Beamline BL3U In T. Hatsui T. Hatsui, N. , N. Kosugi Kosugi et al., presented at SRI2006 et al., presented at SRI2006 Multi-purpose setup S1 M2 sample XES Setup S1X G M2X Side View sample 176 177 173 M1 M0 700 3100 400 2203 500 800 1600 0 5300 6000 9100 9500 11703 12203 13003 14603 M2: Toroidal S1 Multi-purpose setup R=81.65 m = 37.23 mm sample 176 Top View S0 XES Setup S1X sample M1: Spherical in-vacuum G: VLSP 176 M0: Cylindrical R=88.826 m plane undulator M2X: Plane-Elliptical R=47.253 m E/ Δ E>8000 @400 eV r 1 =11.7 m r 2 =0.5 m E/ Δ E>10000 @60 eV VLSP grating monochromator
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