Radiation from Relativistic Electrons in Periodic Structures "RREPS-15"

Session

8. Workshop on THz radiation generation

S8

11 Sept 2015, 09:30

Conveners

8. Workshop on THz radiation generation

• Alexei Kanareykin (Euclid Techlabs LLC)

8. Workshop on THz radiation generation: (continue)

• There are no conveners in this block

46. Progress Towards Compact Pre-bunched FEL Realization

Dr Alexander Aryshev (High Energy Accelerator Research Organization (KEK), Tsukuba, Japan)

11/09/2015, 09:30

8. Advanced Generation of THz and X-ray beams

Invited

The motivation for developing linac-based THz source is coming from the growing interest to THz radiation. High gradient photo-cathode RF gun and few tens of femtosecond laser system are used to generate a pre-bunched electron beam. We have proposed two approaches to produce the intense radiation beams in the range of 0.1-5 THz based on Coherent Smith-Purcell Radiation (CSPR) and Coherent...

10. Terahertz Source Utilizing Resonant Coherent Diffraction Radiation at KEK ERL Test Accelerator

Yosuke Honda (KEK)

11/09/2015, 10:00

8. Advanced Generation of THz and X-ray beams

Oral

An energy recovery linac test accelerator, cERL, has been developing at KEK.It can produce a high repetition rate short bunched electron beam in a continuous operation mode. We propose to develop a high power THz radiation source at the return loop of the cERL. Coherent diffraction radiation of THz regime is emitted when an electron bunch passes through a conductive mirror with a beam hole at...

45. Coherent Radiation Measurements Stations at KEK LUCX Facility

Mikhail Shevelev (KEK)

11/09/2015, 10:15

8. Advanced Generation of THz and X-ray beams

Oral

Recent years have shown the significant progress in the field of application of short and hight brightness THz-frequency pulses. One way to obtain THz radiation pulses is use of coherent radiation generated by femtosecond electron bunches in a compact accelerator. To increase investigation efficiency of various mechanisms for generating EM radiation including stimulated coherent diffraction...

43. Generation of THz Smith-Purcell radiation on femtosecond electron beam

Konstantin Lekomtsev (KEK)

11/09/2015, 10:30

8. Advanced Generation of THz and X-ray beams

Oral

Development of compact, tunable, and high power THz radiation sources is an important task in the field of THz science [1]. Short, hundreds of femtoseconds duration electron bunches may produce coherent THz radiation, by means of Smith-Purcell radiation (SPR) in super – radiant regime [2], occuring when a micro-bunched electron beam travels in the vicinity of a periodic target. LUCX...

11. Micro-Bunch Instabilities as a Source of Coherent THz Radiation

Aiveen Finn (Royal Holloway, University of London)

11/09/2015, 10:45

8. Advanced Generation of THz and X-ray beams

Oral

Schottky barrier diodes (SBD) are known for their low noise, ultra-fast response and excellent sensitivity. They are often implemented as detectors in the millimetre wavelength regime. Micro-bunch instabilities (MBI) have been detected at many lights sources around the world including the Diamond Light Source, UK. These MBI can result in bursts of coherent synchrotron radiation (CSR) with...

63. PiC Code KARAT Simulation of the Narrow-Band Super-Radiant THz Smith-Purcell Radiation Generation

Leonid Sukhikh (Tomsk Polytechnic University)

11/09/2015, 11:20

8. Advanced Generation of THz and X-ray beams

Oral

Numerical simulation of narrow-band THz source based on coherent Smith-Purcell radiation (CSPR) generated by a train of microbunches was carried out using particle-in cell code KARAT [1]. The simulation was carried out for beam parameters of LUCX facility (KEK, Tsukuba, Japan) namely beam energy – 10 MeV, microbunch length – 330 fs, microbunch repetition rate – 1 THz, transverse bunch size –...

42. Corrugated capillary as THz Cherenkov Smith-Purcell radiator

Konstantin Lekomtsev (KEK)

11/09/2015, 11:35

8. Advanced Generation of THz and X-ray beams

Oral

In the past decade accelerator based sources of THz radiation have seen progress in generation of short femtosecond duration electron bunches as well as in THz radiators development. Capillary structures capable of producing powerful Cherenkov radiation wakefields have been used for THz radiation generation [1] as well as for energy modulation in electron beams [2]. Introduction of the...

92. The Source of THz Radiation Based on Dielectric Waveguide Excited by Sequence of Electron Bunches

Alexandr Altmark (Saint-Petersburg State Electrotechnical University)

11/09/2015, 11:50

8. Advanced Generation of THz and X-ray beams

Oral

We present new method of THz Cherenkov radiation excited in dielectric waveguide by relativistic electron bunches. The sequence of bunches generates monochromatic radiation. The frequency of radiation is defined by the distance separation between the bunches. The studies were carried by using the original updated BBU-3000 code which permits to take into account additional options: quadrupole...

6. Electron Bunch Length Diagnostics for the LUCX Facility based on the Coherent Off-axis Undulator Radiation

Dmitry Shkitov (TPU)

11/09/2015, 12:05

8. Advanced Generation of THz and X-ray beams

Oral

In the nearest future the 30 cm compact edge-focusing wiggler [1] will be installed on the LUCX accelerator facility in KEK (Japan). The parameters of this wiggler (K ~ 0.5…2.4, period length is 6 cm) are such that fundamental radiation frequency ω$_{10}$ is equal to 4.16 THz (0.45 mm) for K maximum value with electron energy about 8 MeV. The rms bunch length expected on the LUCX is around 30...