status of delta: light source and short-pulse facility 1 · 2013. 12. 11. · shaukat khan, status...

Shaukat Khan, Status of DELTA, ESLS 2013

11Status of DELTA: Light Source and Short-Pulse Facility Shaukat Khan, Zentrum für Synchrotronstrahlung ESLS Nov 22 2013


2DELTA availablity

IV.2011

I. 2012

II. 2012

III. 2012

IV. 2012

I. 2013

II. 2013

III.2013

91,7 % 94,7% 90,8 % 85,0 % 99,0 % 96,6 % 97,0 % 89,0 %

average

93,0 %

DELTA parameters

beam energy 1.5 GeVcircumference 115.2 mbeam current 130 / 20 mAhor. emittance 15 nm radbunch length 100 ps


3Beam lifetime(R. Floegel, M. Höner, M. Jebramcik, P. Hartmann, H. Huck, S. Khan, R. Molo, B. Riemann, D. Schirmer, G. Schmidt, G. Schünemann, M. Sommer, A. Strasser*, P. Towalski, T. Weis)

beam lifetime at 100 mA 2005-2013

Bachelor thesis M. Jebramcik 2013

- multibunch operation: gas scattering dominates- single-bunch mode: Touschek and gas scattering

- gas pressure ~ beam current (sync. rad. desorption)~ bunch current (local impedance effect?)


4Alignment of the storage ring(U. Berges, G. Dahlmann, T. Dybiona, B. Isbarn, B. Hippert, P. Kortmann, G. Pike**, H. Rast, G. Schmidt, T. Schulte-Eickhoff; **Faculty of Physics, TU Dortmund)

verti

cal d

evia

tion

(mm

)

position along the ring (m)

Vertical alignment

- improved lifetime, injection efficiency- reduced radiation level

Horizontal alignment planned

- 180 reference panels for Taylor-Hobson spheres- 80 position encodes- cooling improved etc.


5Superconducting wiggler(P. Kortmann, G. Schmidt, S. Khan)

Broken high-TC current feedthrough (2010):two spares delivered with > 2 years delay.

Superconducting asymmetric wiggler

- is ageing, no support from manufacturer- request for funding

... no asymmetry option

... higher field (7 T)

... more periods (~10)

... RF upgrade


6Injection

New electron gun and kicker pulsers since 2011

- flexibility in fill pattern: single-, multibunch, hybrid

New prebuncher

- linac current increased by 50%

(significant contribution from bachelor students F. Frank & J. Schulze)

(W. Brembt, F. Frank, P. Hartmann, J. Schulze, V. Kniss, T. Weis)


7StabilityFast orbit feedback

- range 1 - 400 Hz- hardware completed- tests in January

(P. Hartmann, S. Khan, B. Riemann, G. Schünemann, P. Towalski, T. Weis)

Bunch-by-bunch feedback systems

- damp longitudinal and transverse oscillations- accelerator studies and diagnostics

... wake field studies

... injection studies

... beam loss monitor

(M. Höner, S. Khan, D. Teytelman/Dimtel Inc.)

horizontal correctorvertical corrector


8Facility for ultrashort VUV and THz pulses

Coherent harmonic generation (CHG)

- laser-induced energy modulation in 1. undulator- converted to density modulation in a chicane- coherent radiation of harmonics in 2. undulator

Echo-enabled harmonic generation (EEHG)

- requires 3 undulators and 2 chicanes- more complex density modulation- higher harmonics, shorter wavelength

(F. Bahnsen, L. Böttger, S. Cramm+, S. Döring++, J. Greve, N. Hiller&, V. Judin&, M. Höner, H. Huck, M. Huck, S. Khan, C. Mai, R. Molo,L. Plucinski+, J. Raasch++, A. Schick, C. Schneider+/++, M. Siegel&, P. Thoma&, P. Ungelenk; +FZ Jülich, ++U Duisburg-Essen, &KIT Karlsruhe)

100 ps (33 mm)

45 fs (15 m)



laser lab withfs laser system

new dedicated far-IR beamline

VUV beamline (BL5)and pump-pulse beamline

U250 undulator with new power supplies

diagnostics at BL 4



Status

- 2011 seeding with 800 nm (4. harmonic: 200 nm seen)- 2012 seeding with 400 nm (5. harmonic: 80 nm seen)- goal: seeding with 267 nm (5. harmonic: 53 nm)

Project boosted by rewiring the chicane

- from s-shaped to u-shaped chicane- optimum density modulation and beyond

calculations by undergraduate student J. Grewe,hardware G. Dahlmann et al.



-20 0 20 400

0.2

0.4

0.6

delay (fs)

visi

bilit

y

Gated iCCD UV camera courtesyB. Schmidt, S. Wunderlich, DESY.

Advantage of DELTA: ample beamtime

- machine studies (10 weeks/y)- Fr after user operation (20 weeks/y)- even during user operation

Short-term goals

- reach and surpass previous achievements

ACO: B. Girard et al., PRL 53 (1984), 2405UVSOR: M. Labat et al., PRL 101 (2008), 164803ELETTRA: E. Allaria et al., PRL 100 (2008), 174801


13Facility for ultrashort VUV and THz pulsesAdvantage of DELTA: ample beamtime


Short-term goals


Gated iCCD UV camera courtesyB. Schmidt, S. Wunderlich, DESY.

ACO: B. Girard et al., PRL 53 (1984), 2405UVSOR: M. Labat et al., PRL 101 (2008), 164803ELETTRA: E. Allaria et al., PRL 100 (2008), 174801


14Facility for ultrashort VUV and THz pulsesAdvantage of DELTA: ample beamtime


Short-term goals


- first pump-probe experiments... pump and probe pulse on sample... timing within 1 ps ok

600

150


15Facility for ultrashort VUV and THz pulsesCoherent THz radiation

- intense broadband 1 ps pulses- laser-electron and beam diagnostics- future pump-probe experiments

InSb bolometer ~ 1 sNiN bolometer (KIT) 160 psYBCO bolometer (KIT) 20 ps


16Facility for ultrashort VUV and THz pulsesCoherent THz radiation

- intense broadband 1 ps pulses- laser-electron and beam diagnostics- future pump-probe experiments


17Echo-enabled harmonic generation at DELTASupported by Helmholtz ARD initiative (FZ Jülich)

- modulators: 2 short undulators- radiator: present U250 undulator- requires longer straight section- modified storage ring optics- additional undulator for "slicing"

FLASH ORS design


18Echo-enabled harmonic generation at DELTA

present layout:

Diplom thesis, R. Molo:

New layout, R. Molo:

Supported by Helmholtz ARD initiative (FZ Jülich)

- modulators: 2 short undulators- radiator: present U250 undulator- requires longer straight section- modified storage ring optics- additional undulator for "slicing"


19External activities(BMBF Verbundforschung)

DESY Hamburg: sFLASH, ORS, EEHG

(K. Hacker, S. Khan, R. Molo)

HZB Berlin: novel injection scheme, RF for BERLinPro and BESSY VSR

FZ Jülich and GSI: fast orbit measurement and correction

(B. Isbarn, H. Rast, B. Riemamm, G. Schünemann, M. Sommer, P. Towalski, T. Weis)


20Accelerator physics in the master curriculum

Bachelor-, Master- and PhD work

Two-semester accelerator course

- alternatively to solid-state and particle theory- comprises 2 h lecture

1 h exercises1 h seminarfield trips


21

Rektorat of TU Dortmund,Faculty of Physics, MEC, Kuratorium

Users: FZ Jülich, ISAS e.V., Univ. Siegen, Wuppertal and more

Tax payer:DFG, BMBF, MIWF NRW

colleagues at DESY, FZJ, GSI, HZB, KIT and many others

colleagues at TU Dortmund:machine, beamlines, workshops, administration

Acknowledgements

status of delta: light source and short-pulse facility 1 · 2013. 12. 11. · shaukat khan, status...

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