The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
George Kanakaris - One of the best experts on this subject based on the ideXlab platform.
-
Laser welding in MvB
internal, 2017Co-Authors: George KanakarisAbstract:to corrosion than the rest of the blade, however the edges of the blade are the most susceptible. The welding strength is dependent on the beam power and the exposure
Robert F Welton - One of the best experts on this subject based on the ideXlab platform.
-
Ramping up the Spallation Neutron Source Beam Power with the H- source using 0 mg Cs/day.
The Review of scientific instruments, 2010Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:This paper describes the ramp up of the Beam Power for the Spallation Neutron Source by ramping up the pulse length, the repetition rate, and the Beam current emerging from the H− source. Starting out with low repetition rates (≤10 Hz) and short pulse lengths (≤0.2 ms), the H− source and low-energy Beam transport delivered from Lawrence Berkeley National Laboratory exceeded the requirements with almost perfect availability. This paper discusses the modifications that were required to exceed 0.2 ms pulse length and 0.2% duty factor with acceptable availability and performance. Currently, the source is supporting neutron production at 1 MW with 38 mA linac Beam current at 60 Hz and 0.9 ms pulse length. The pulse length will be increased to ∼1.1 ms to meet the requirements for neutron production with a Power between 1 and 1.4 MW. A medium-energy Beam transport (MEBT) Beam current of 46 mA with a 5.4% duty factor has been demonstrated for 32 h. A 56 mA MEBT Beam current with a 4.1% duty factor has been demons...
-
ramping up the sns Beam Power with the lbnl baseline h source
NEGATIVE IONS BEAMS AND SOURCES: Proceedings of the 1st International Symposium#N#on Negative Ions Beams and Sources, 2009Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Denny J Newland, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:LBNL designed and built the Frontend for the Spallation Neutron Source, including its H− source and Low‐Energy Beam Transport (LEBT). This paper discusses the performance of the H− source and LEBT during the commissioning of the accelerator, as well as their performance while ramping up the SNS Beam Power to 540 kW. Detailed discussions of major shortcomings and their mitigations are presented to illustrate the effort needed to take even a well‐designed R&D ion source into operation. With these modifications, at 4% duty factor the LBNL H− source meets the essential requirements that were set at the beginning of the project.
-
Ramping Up the SNS Beam Power with the LBNL Baseline H− Source
AIP Conference Proceedings, 2009Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Denny J Newland, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:LBNL designed and built the Frontend for the Spallation Neutron Source, including its H− source and Low‐Energy Beam Transport (LEBT). This paper discusses the performance of the H− source and LEBT during the commissioning of the accelerator, as well as their performance while ramping up the SNS Beam Power to 540 kW. Detailed discussions of major shortcomings and their mitigations are presented to illustrate the effort needed to take even a well‐designed R&D ion source into operation. With these modifications, at 4% duty factor the LBNL H− source meets the essential requirements that were set at the beginning of the project.
Kunchi Peng - One of the best experts on this subject based on the ideXlab platform.
-
Dependence of the squeezing and anti-squeezing factors of bright squeezed light on the seed Beam Power and pump Beam noise
Optics letters, 2019Co-Authors: Xiaocong Sun, Yajun Wang, Long Tian, Shaoping Shi, Yaohui Zheng, Kunchi PengAbstract:We demonstrate the dependence of the squeezing and anti-squeezing factors on the seed Beam Power at different pump Beam noise levels. The results indicate that a seed field injected into the optical parametric amplifier (OPA) dramatically degenerates the squeezing factor due to noise coupling between the pump and seed fields, even if both the pump and seed fields reach the shot noise limit. The squeezing and anti-squeezing factors are immune to the pump Beam noise due to no noise coupling when the system operates for the generation of squeezed vacuum states. The squeezing factor degrades gradually as the pump Beam intensity noise and seed Beam Power is increased. The influence of the two orthogonal quadrature variations is mutually independent of each other.
Hideaki Hotchi - One of the best experts on this subject based on the ideXlab platform.
-
Accelerator Design for 1.3 MW Beam Power Operation of the J-PARC Main Ring
Progress of Theoretical and Experimental Physics, 2021Co-Authors: Susumu Igarashi, Kenichirou Satou, Chihiro Ohmori, Yoshitugu Arakaki, Masashi Furusawa, Keigo Hara, Katsushi Hasegawa, Yoshinori Hashimoto, Yoichiro Hori, Hideaki HotchiAbstract:Abstract The J-PARC Main Ring (MR) has supplied the high-intensity proton Beam for the T2K long-baseline neutrino experiment since 2010. The present Beam Power is 510 kW and the total number of protons on the target reaches $3.64\times10^{21}$. To observe charge-conjugation and parity-transformation (CP) violation in the lepton sector with high accuracy, more protons need to be delivered to the T2K target. The project to upgrade the Beam Power to 1.3 MW started as a mid-term plan of the MR. In parallel to preparing a full technical design report, the technical designs of hardware upgrades using new technologies and all accelerator components that are necessary to deliver the 1.3-MW Beam Power are summarized and consolidated in this short paper. Further, this paper includes Beam dynamics studies and simulation results for handling $3.3\times 10^{14}$ protons per pulse (ppp) without significant Beam loss in the ring and transport lines. The Hyper-Kamiokande (HK) project has recently been approved, and construction has started; the MR upgrade and HK project will work together efficiently to study the CP violation.
-
Design of Injection and Extraction at an 8-GeV Booster Ring and the J-PARC Main Ring for Multi-MW Output Beam Power
Proceedings of the 2nd International Symposium on Science at J-PARC — Unlocking the Mysteries of Life Matter and the Universe —, 2015Co-Authors: Hiroyuki Harada, Hideaki Hotchi, S. Igarashi, Yoichi Sato, Tadashi KosekiAbstract:The 240-kW output Beam Power in the MR has been achieved for a 30-GeV user operation with the repetition cycle of 2.48 sec and injecting proton Beams of 380-kW equivalent intensity from RCS. The MR aims to realize 750-kW Beam operation with faster repetition cycle of ~1 sec and injecting proton Beams of 600-kW equivalent intensity from RCS. The MR is developing the new type Power supplies of MR main magnets and high-impedance core of MR RF cavities toward faster repetition cycle. We are now exploring the further Beam Power upgrade scenario of the J-PARC accelerators. As one possible scenario toward a multi-MW output Beam Power from MR, a new 8-GeV booster ring (BR) between RCS and MR is also designed. The injection energy of the MR increases from present 3-GeV to 8-GeV. The higher injection energy of the MR would be able to mitigate a space charge force in MR injection energy region and secure the acceptance clearance of Beam from MR physical aperture. In this paper, the designed injection and extraction system of BR are described. Additionally, a new concept of BR extraction and MR injection toward multi-MW output Beam Power are described.
Martin P. Stockli - One of the best experts on this subject based on the ideXlab platform.
-
Ramping up the Spallation Neutron Source Beam Power with the H- source using 0 mg Cs/day.
The Review of scientific instruments, 2010Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:This paper describes the ramp up of the Beam Power for the Spallation Neutron Source by ramping up the pulse length, the repetition rate, and the Beam current emerging from the H− source. Starting out with low repetition rates (≤10 Hz) and short pulse lengths (≤0.2 ms), the H− source and low-energy Beam transport delivered from Lawrence Berkeley National Laboratory exceeded the requirements with almost perfect availability. This paper discusses the modifications that were required to exceed 0.2 ms pulse length and 0.2% duty factor with acceptable availability and performance. Currently, the source is supporting neutron production at 1 MW with 38 mA linac Beam current at 60 Hz and 0.9 ms pulse length. The pulse length will be increased to ∼1.1 ms to meet the requirements for neutron production with a Power between 1 and 1.4 MW. A medium-energy Beam transport (MEBT) Beam current of 46 mA with a 5.4% duty factor has been demonstrated for 32 h. A 56 mA MEBT Beam current with a 4.1% duty factor has been demons...
-
ramping up the sns Beam Power with the lbnl baseline h source
NEGATIVE IONS BEAMS AND SOURCES: Proceedings of the 1st International Symposium#N#on Negative Ions Beams and Sources, 2009Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Denny J Newland, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:LBNL designed and built the Frontend for the Spallation Neutron Source, including its H− source and Low‐Energy Beam Transport (LEBT). This paper discusses the performance of the H− source and LEBT during the commissioning of the accelerator, as well as their performance while ramping up the SNS Beam Power to 540 kW. Detailed discussions of major shortcomings and their mitigations are presented to illustrate the effort needed to take even a well‐designed R&D ion source into operation. With these modifications, at 4% duty factor the LBNL H− source meets the essential requirements that were set at the beginning of the project.
-
Ramping Up the SNS Beam Power with the LBNL Baseline H− Source
AIP Conference Proceedings, 2009Co-Authors: Martin P. Stockli, Baoxi Han, S. N. Murray, Denny J Newland, Terry R Pennisi, Manuel Santana, Robert F WeltonAbstract:LBNL designed and built the Frontend for the Spallation Neutron Source, including its H− source and Low‐Energy Beam Transport (LEBT). This paper discusses the performance of the H− source and LEBT during the commissioning of the accelerator, as well as their performance while ramping up the SNS Beam Power to 540 kW. Detailed discussions of major shortcomings and their mitigations are presented to illustrate the effort needed to take even a well‐designed R&D ion source into operation. With these modifications, at 4% duty factor the LBNL H− source meets the essential requirements that were set at the beginning of the project.