1 / 7

Addressing Machine Protection Challenges in Linear Collider Systems

This paper examines critical protection issues related to Linear Collider (LINAC) systems, focusing on the injection system, damping rings, and beam delivery mechanisms. Key concerns include maintaining machine activity during faults, implementing effective monitoring of beam orbits, and ensuring hardware verification for safe energy extraction. Solutions are proposed for various operational challenges such as RF phasing, alignment, and emergency extraction strategies. Insights into material damage limits and maintenance protocols are provided to mitigate risks while enhancing system stability and performance.

stacia
Télécharger la présentation

Addressing Machine Protection Challenges in Linear Collider Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Linear Collider Machine Protection IssuesM. Palmer • Injection System • Injector • Damping Rings • Bunch Compressor and Transfer Sections • Main LINAC • Beam Delivery System • Questions

  2. Injection System

  3. Main NLC LINAC • MAID System • Monitor orbit tolerance • Generate permit for DR extraction • Hardware verification required for DR extraction • Klystron/Modulator, Magnets, Movers, Timing, Control System • 100ms polling timescale • Specific concern: Possible back-phasing of RF sector. Implications? • Pre-LINAC beam dumps? • Keep as much of machine active as possible during fault • Pilot Pulse • Require low intensity pulse to avoid damage • Ii10x, ehh10x, evh1000x • Operative when break in operation of < 1 sec. Detailed ramp to full intensity

  4. Main TESLA LINAC • TTF methods • Monitor current losses • Inhibit gun (3-5 ms) • Similar methods may be applied in final design • Orbit tolerance monitoring easily added • Easily applicable at LINAC start • Beam remains in DR on LINAC inhibit • Beam expected to continue thru LINAC on magnet or module failure • Fast Emergency Extraction Line (FEXL) at end of LINAC • Diverts beam from BDS in 1-2 bunches • Inhibits DR extraction within ~200 bunches of problem • Serves as bypass during commissioning

  5. LINAC Bunches & Current Densities

  6. Beam Delivery System

  7. Questions • Injector System/Damping Rings • Stability issues for downstream fault • Beam dump between DR and LINAC • Permanent Magnet Wiggler/Undulator protection issues • LINAC • Early LINAC protection scenarios • RF phasing • System Issues • Startup and recovery plans • Alignment • Optics validation • Protection system failure analysis • Collimation Issues • Spoilers • Near miss damage • Replacement/maintenance issues • Material damage limits • Absorber • Energy distribution • Beam Halo Implications for Detectors

More Related