1 / 4

Symptoms

Symptoms. Several RCBY circuits exhibit the following symptoms: PC regulation problems that can be mitigated by changing the regulation model to one with a (virtual) parallel resistance. Quenches on ramp-down with a characteristic “hump” in the current curve.

dugan
Download Presentation

Symptoms

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. Symptoms • Several RCBY circuits exhibit the following symptoms: • PC regulation problems that can be mitigated by changing the regulation model to one with a (virtual) parallel resistance. • Quenches on ramp-down with a characteristic “hump” in the current curve. • Limited performance also on ramp up.

  2. Detailed analysis • Y. Thurel presentation EDMS 1053978 • excludes a PC issue, • gives experimental current- and ramp-rate limits for stable operation (see next slide). • Manuel Dominguez TE-MPE-TM, 28.07.2011, reproduces behavior assuming a short-circuit between one or more of the 15 layers of winding.

  3. Affected circuits • Circuits that exhibit quenches on ramp-down with characteristic humps and control problems. • Reception tests: • all magnets showed good training (ramp-up only). • ramp-rate during magnetic-measurement stairsteps (up and down) unknown. • Sources: • Nuria Catalan “What (else) needs to be done to reach beam energy above 3.5 TeV?”, Chamonix 2011. • MirkoPojer, MatteoSolfaroli “Parameters to be used for the Powering Test Campaign before LS1”, EDMS 1265662

  4. Affected circuits continued • The following circuits could be removed from the list.

More Related