1 / 9

LHC PIC performance and aspects related to the injectors

LHC PIC performance and aspects related to the injectors. G. Arduini with input from O. Brüning , R. De Maria, S. Fartoukh, P. Fessia, S. Gilardoni, B. Gorini, L. Rossi, G. Rumolo, R. Tomàs. Main Hardware changes: being finalized. PIC New TAS, 60 mm, IT, D1, 150 mm, correctors

elma
Télécharger la présentation

LHC PIC performance and aspects related to the injectors

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. LHC PIC performance and aspects related to the injectors G. Arduini with input from O. Brüning, R. De Maria, S. Fartoukh, P. Fessia, S. Gilardoni, B. Gorini, L. Rossi, G. Rumolo, R. Tomàs

  2. Main Hardware changes: being finalized PIC • New TAS, 60 mm, IT, D1, 150 mm, correctors • New collimatorswith buttons, new materialsfor robustness and impedance, new TCTs in IR1-5 for D2-Q5 for cleaning and protection • Arc sextupoles (MS) at 600A • SC links in IR15, QRL • New poweringwith SC links at P7 (RR) • New Cryoplant P4 for SCRF • Cryoplants in P1,5 • Beampipes and Y chamberbetween D1 and TAN3

  3. Filling schemes 25 ns

  4. LHC Injection to Collisions • 5% intensity loss assumed • 20% emittance blow-up budget, implies: • Control of the additive sources of blow-up • Control of the blow-up due to electron clouds (successful scrubbing in the dipoles) • Impedance reduction with metallic collimators

  5. Assumptions for the performance estimates • Average pile-up limitin IP1-5: • 140 evt per crossing; • 1.4 evt/mm accepted but 0.7 evt/mm shouldbe the target; • Burn-off and pile-up estimation based on: • Assumed visible cross-section: 85 mb; • Assumed total cross-section: 100 mb; • Emittanceevolutionincluding: • IBS • Radiation damping • Can representprettywell performance in 2012 (when no instabilitesobserved). Onlyunknownlifetime component is >100 h.

  6. Fill 2728

  7. PIC @ 6.5 TeV (Pile-up limit at 140) • b*=40/20 cm could be relaxed to gain aperture and reduce pile-up density (e.g. 50/25 - S. Fartoukh) with little loss in integrated luminosity. • Required beam-beam separation being finalized (13 sigmas might be preferable with flat beams)

  8. PIC @ 6.5 TeV (Pile-up limit at 40)

  9. Some Conclusions • Significant margin: possibility to produce up to 120 fb-1/year but • Pile-up is the stronger limitation for the performance • BCMS and Standard production schemes give similar performance

More Related