“…In our case, the kick angle corresponding to a beam offset of 10 mm, bunch charge of 10 fC, iris radius of 3.37 cm, bunch length of 3 ps, and energy of 0.39 MeV is lower than 0.04 rad, i.e., negligible. It was verified experimentally that the emittance growth owing to the radial electric-field is significantly greater than the contribution by long-range and short-range wakefield effects 58 . Figure 5 Layout of an injector beam line for the cERL.…”
Section: Methodsmentioning
confidence: 94%
“…5 . Next, the strength of the corrector magnet was set to the beam passing the accelerating RF cavity with a reasonable beam offset, 7.85 mm 58 , and the beam position was measured at the profile monitor while the phase of the accelerating RF cavity was changed. Figure 7 Result of the measurement of the displacement of the beam position at the profile monitor as a function of the RF phase.…”
We demonstrate an experimental methodology for measuring the temporal distribution of pico-second level electron bunch with low energy using radial electric and azimuthal magnetic fields of an accelerating ($$\hbox {TM}_{01}$$
TM
01
mode) radio frequency (RF) cavity that is used for accelerating electron beams in a linear accelerator. In this new technique, an accelerating RF cavity provides a phase-dependent transverse kick to the electrons, resulting in the linear coupling of the trajectory angle with the longitudinal position inside the bunch. This method does not require additional devices on the beamline since it uses an existing accelerating cavity for the projection of the temporal distribution to the transverse direction. We present the theoretical basis of the proposed method and validate it experimentally in the compact-energy recovery linac accelerator at KEK. Measurements were demonstrated using a 2-cell superconducting booster cavity with a peak on-axis accelerating field ($$E_0$$
E
0
) of 7.21 MV/m.
“…In our case, the kick angle corresponding to a beam offset of 10 mm, bunch charge of 10 fC, iris radius of 3.37 cm, bunch length of 3 ps, and energy of 0.39 MeV is lower than 0.04 rad, i.e., negligible. It was verified experimentally that the emittance growth owing to the radial electric-field is significantly greater than the contribution by long-range and short-range wakefield effects 58 . Figure 5 Layout of an injector beam line for the cERL.…”
Section: Methodsmentioning
confidence: 94%
“…5 . Next, the strength of the corrector magnet was set to the beam passing the accelerating RF cavity with a reasonable beam offset, 7.85 mm 58 , and the beam position was measured at the profile monitor while the phase of the accelerating RF cavity was changed. Figure 7 Result of the measurement of the displacement of the beam position at the profile monitor as a function of the RF phase.…”
We demonstrate an experimental methodology for measuring the temporal distribution of pico-second level electron bunch with low energy using radial electric and azimuthal magnetic fields of an accelerating ($$\hbox {TM}_{01}$$
TM
01
mode) radio frequency (RF) cavity that is used for accelerating electron beams in a linear accelerator. In this new technique, an accelerating RF cavity provides a phase-dependent transverse kick to the electrons, resulting in the linear coupling of the trajectory angle with the longitudinal position inside the bunch. This method does not require additional devices on the beamline since it uses an existing accelerating cavity for the projection of the temporal distribution to the transverse direction. We present the theoretical basis of the proposed method and validate it experimentally in the compact-energy recovery linac accelerator at KEK. Measurements were demonstrated using a 2-cell superconducting booster cavity with a peak on-axis accelerating field ($$E_0$$
E
0
) of 7.21 MV/m.
“…The size of the muon beam is very large, and the effective number of muons in each experiment is several percent of the muons produced by using conventional techniques, because pions are produced diversely at the pion production target. The production technique of low-energy muons is one of the methods to solve the problem [27]. The MegaGauss techniques [28,29] have been introduced recently and nondestructive solenoid magnets with strong fields of 70 T have been used in the solid-state research.…”
Section: Discussion For Supplementary Devices and Developmentsmentioning
A new high-energy particle accelerator with static combined type of magnetic field and high-gradient resonant cavities is introduced for muon acceleration up to 300 MeV and proton acceleration up to 400 MeV. The accelerator concept is expected to realize Mpps-class rapid cycling high-energy particle acceleration in circular particle accelerators. Conceptual designs of the circular accelerator are discussed with an emphasis on short lifetime particles. The fundamental concept of particle acceleration and the related practical issues, which should be discussed when designing the accelerators, are described as well.
“…A photoemission electron gun injector, followed by a superconducting rf cavity for acceleration [23][24][25][26][27][28], was adapted as an electron source for LEReC. This choice took advantage of the high-voltage electron gun experience and the excellent beam quality achieved at Cornell University [29][30][31][32][33][34][35][36][37], in Japan [38][39][40][41][42][43][44] and at Jefferson National Lab [45][46][47][48]. It has been demonstrated that a high-voltage dc photoemission gun can have good beam quality, such as low emittance [30,31] and high average current [29].…”
The Low Energy RHIC electron Cooling (LEReC) project at Brookhaven National Laboratory recently demonstrated for the first time cooling of hadron bunches with radio-frequency (rf) accelerated electron bunches. LEReC uses a high-voltage photoemission electron gun with stringent requirements for beam current, beam quality, and stability. The electron gun has a photocathode with a high-power fiber laser, and a novel cathode production, transport, and exchange system. It has been demonstrated that the high-voltage photoemission gun can continually produce a high-current electron beam with a beam quality suitable for electron cooling. We describe the operational experience with the LEReC dc photoemission gun in RHIC and discuss the important aspects needed to achieve the required beam current, beam quality, and stability.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
