English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The normal conducting Annular Coupled Structure (ACS) is applied for 190-400MeV part of high intensity proton linac for the J-PARC. The ACS operatingfrequency is 972 MHz. The J-PARC ACS is strongly based on the results ofprevious investigations, especially results of Japan Hadron Project (JHP)research program in KEK. However, the design was revised and optimized to meetthe requirements of reliability, operation efficiency and cost reduction. Thecells shape of accelerating cells was optimized in total energy range to havehigh shunt impedance value together with the careful matching with thedecreased coupling cells. The design of the bridge coupler cells was optimizedto simplify mass production and shape of RF input cell together with matchingwindow were optimized for higher operational reliability. Collected andadjusted all together, these modifications result in the significant effect.The ACS module design doesn't lose to another possible accelerating structuresin RF parameters and dimensions. Previously developed for L-band ACSfabrication technique is applied to 972 MHz ACS construction. The realizedsolutions have the reserve for ACS module use with very high heat loadingduring operations with 15% duty factor, the highest heat loading at presenttime, as compared to accelerating modules with another normal conductingaccelerating structures, realized in hadron linacs. This report contains thedescriptions and explanations of changes in the ACS module physical design forthe J-PARC linac.

The Summary for Optimization of the Annular Coupled Structure Accelerating Module Physical Design for High Intensity Hadron Linac