TY  - CONF
AU  - Dovlatyan, L.
AU  - Antonsen, T.M.
AU  - Beaudoin, B.L.
AU  - Haber, I.
AU  - Matthew, D.B.
AU  - Ruisard, K.J.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Preliminary Lattice Studies for the Single-Invariant Optics Experiment at the University of Maryland
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A novel approach to transverse resonance suppression in next generation high-intensity accelerators is the use of nonlinear optical elements to induce large tune spreads which result in reduced responses to resonance driving perturbations*. In order to test this theory, we have built and characterized an octupole channel insert for use in the University of Maryland Electron Ring (UMER). This paper presents experimental lattice studies using a low space-charge intensity beam at an energy of 10keV with a beam current of ~150uA, tune depression < 0.005, and unnormalized RMS emittance of 4.3 mm-mr. We apply beam based measurement techniques in order to evaluate the quality of our single-invariant lattice and better understand the nonlinearities created by the octupole channel.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 367
EP  - 370
KW  - lattice
KW  - experiment
KW  - octupole
KW  - optics
KW  - resonance
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPGW105
UR  - http://jacow.org/ipac2019/papers/mopgw105.pdf
ER  - 

TY  - CONF
AU  - Wolfenden, J.
AU  - Brandin, M.
AU  - Fiorito, R.B.
AU  - Kyle, B.S.
AU  - Mansten, E.
AU  - Pacey, T.H.
AU  - Shkvarunets, A.G.
AU  - Thorin, S.
AU  - Welsch, C.P.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Coherent Transition Radiation Spatial Imaging as a Bunch Length Monitor
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - High-resolution bunch length measurement is a key component in the optimisation of beam quality in FELs, storage rings, and plasma-based accelerators. Simulations have shown that the profile of a coherent transition radiation (CTR) image produced by a charged particle beam is sensitive to bunch length and can thus be used as a diagnostic. This contribution presents the development progress of a novel bunch length monitor based on imaging the spatial distribution of CTR. Due to the bunch lengths studied, 10fs-100fs FWHM, the radiation of interest was in the THz range. This led to the development of a THz imaging system, which can be applied to both high and low energy electron beams. The associated benefits of this imaging distribution methodology over the typical angular distribution measurement are discussed. Building upon preliminary multi-shot proof of concept results last year, a new series of experiments have been conducted in the short pulse facility (SPF) at MAX IV. Single-shot measurements have been used to measure the exact point of maximum compression. Analysis from the proof of concept results last year, and initial results from the new measurements this year are discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2713
EP  - 2716
KW  - radiation
KW  - electron
KW  - detector
KW  - simulation
KW  - focusing
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPGW095
UR  - http://jacow.org/ipac2019/papers/wepgw095.pdf
ER  -