Status of the development of Delhi Light Source (DLS) at IUAC

Ghosh, Subhendu; Joshi, V.; Urakawa, J.; Terunuma, N.; Aryshev, Alexander; Fukuda, Shigeki; Fukuda, Masafumi; Sahu, Biswamitra; Patra, P.; Abhilash, S.R.; Karmakar, J.; Karmakar, B.; Kabiraj, D.; Kumar, N. V. Narendra; Sharma, Ashish; Chaudhari, G. K.; Pandey, Ashutosh; Tripathi, Sumit; Deshpande, A.; Naik, Vaishali; Roy, A.; Rao, T.; Bhandari, R.K.; Kanjilal, D.

doi:10.1016/j.nimb.2017.03.108

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…The beam optics calculations were performed using the GPT code to check the feasibility of generating the comb electron beam by laser micro-pulses incident on the photocathode [61,65]. The electron beam generated at the photocathode was accelerated by the 2.6 cell RF cavity and subsequently focused by the solenoid and the quadrupole magnet to produce a very tight beam size in y-direction (a few hundreds of micron) and somewhat larger size in x-direction (a few m.m.)…”

Section: Beam Optics Simulationsmentioning

confidence: 99%

“…In this paper, a compact THz source project at IUAC, named as Delhi Light Source (DLS) [61], capable of producing continuously tunable, narrowband, multi-cycle, coherent THz pulses in the range of ∼0.18 to 3 THz from a train of super-radiant micro-bunches (henceforth called as "comb" beam) is being presented. In the present approach, we show that train of super-radiant microbunches can be produced from a normal conducting photocathode electron gun by temporally modulating the incident photolaser; eliminating the need of a magnetic chicane to compress the electron bunch and reducing the size of the beamline.…”

Section: Introductionmentioning

confidence: 99%

“…The complete facility will be developed in three phases and the work towards the Phase 1 (layout shown in 1) is presently going on. The aim of the first phase is to develop a compact super-radiant THz source based on normal conducting (OFHC copper) photo-injector for pulsed mode operation [61].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and simulation study of ‘Comb’ electron beam and THz generation

Joshi

Lehnert

Karmakar

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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A compact accelerator based super-radiant THz source is under development at Inter University Accelerator Centre (IUAC), New Delhi. The facility is based on the principle of pre-bunched Free Electron Laser (FEL) which will produce THz radiation in the range of ∼0.18 to 3 THz from a modulated electron beam. A photocathode electron gun will generate a short train of microbunches (a "comb" beam) driven by a fiber laser system capable of producing multi micro-pulse laser beam with variable separation ( "comb" laser pulse). Upon acceleration, the electron beam will be injected in to a compact undulator magnet tuned to the same frequency as the separation of the electron micro-bunches. The paper discusses the process of enhancement of super-radiant emission of radiation due to modulation in the comb beam and the conditions required to achieve maximum enhancement of the radiation power. The feasibility study of generating a comb beam at the photocathode and its transport through the beamline while preserving its temporal structure has been reported. To evaluate the characteristics of the radiation emitted from the comb beam, a C ++ based particle tracker and Liẽnard-Wiechert field solver has been developed. The conceptual understanding of the emission of radiation from comb beam is shown to conform with the numerical results. The code has been used to calculate the radiation pulse energy emitted into the central cone of undulator for various comb beam configurations.

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Section: Beam Optics Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%