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
Shaukat Khan, Status of DELTA, ESLS 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
Shaukat Khan, Status of DELTA, ESLS 2013
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?)
Shaukat Khan, Status of DELTA, ESLS 2013
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.
Shaukat Khan, Status of DELTA, ESLS 2013
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
Shaukat Khan, Status of DELTA, ESLS 2013
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)
Shaukat Khan, Status of DELTA, ESLS 2013
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
Shaukat Khan, Status of DELTA, ESLS 2013
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)
Shaukat Khan, Status of DELTA, ESLS 2013
9Facility for ultrashort VUV and THz pulses
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
Shaukat Khan, Status of DELTA, ESLS 2013
10Facility for ultrashort VUV and THz pulses
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.
Shaukat Khan, Status of DELTA, ESLS 2013
11Facility for ultrashort VUV and THz pulses
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.
Shaukat Khan, Status of DELTA, ESLS 2013
12Facility for ultrashort VUV and THz pulses
-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
Shaukat Khan, Status of DELTA, ESLS 2013
13Facility for ultrashort VUV and THz pulsesAdvantage 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
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
Shaukat Khan, Status of DELTA, ESLS 2013
14Facility for ultrashort VUV and THz pulsesAdvantage 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
- first pump-probe experiments... pump and probe pulse on sample... timing within 1 ps ok
600
150
Shaukat Khan, Status of DELTA, ESLS 2013
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
Shaukat Khan, Status of DELTA, ESLS 2013
16Facility for ultrashort VUV and THz pulsesCoherent THz radiation
- intense broadband 1 ps pulses- laser-electron and beam diagnostics- future pump-probe experiments
Shaukat Khan, Status of DELTA, ESLS 2013
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
Shaukat Khan, Status of DELTA, ESLS 2013
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"
Shaukat Khan, Status of DELTA, ESLS 2013
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)
Shaukat Khan, Status of DELTA, ESLS 2013
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
Shaukat Khan, Status of DELTA, ESLS 2013
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