An Alternative High Luminosity LHC with Flat Optics and Long-Range Beam-Beam Compensation

Conference · Mon Jun 01 00:00:00 EDT 2015

OSTI ID:1250512

Fartoukh, Stephane ^[1]; Valishev, Alexander ^[2]; Shatilov, Dmitry ^[3]

---

1. CERN
2. Fermilab
3. BINP, Novosibirsk

In the baseline scenario of the High-Luminosity LHC (HL-LHC), the geometric loss of luminosity in the two high luminosity experiments due to collisions with a large crossing angle is recovered by tilting the bunches in the interaction region with the use of crab cavities. A possible backup scenario would rely on a reduced crossing angle together with flat optics (with different horizontal and vertical $$\beta^{\ast}$$values) for the preservation of luminosity performance. However, the reduction of crossing angle coupled with the flat optics significantly enhances the strength of long-range beam-beam interactions. This paper discusses the possibility to mitigate the long-range beam-beam effects by current bearing wire compensators (or e-lens). We develop a new HL-LHC parameter list and analyze it in terms of integrated luminosity performance as compared to the baseline. Further, we evaluate the operational scenarios using numerical simulations of single-particle dynamics with beam-beam effects.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1250512
• Report Number(s): FERMILAB-CONF-15-169-APC; CERN-ACC-2015-0180; 1406062
• Resource Relation: Conference: 6th International Particle Accelerator Conference, Richmond, Virginia, USA, 05/03-05/08/2015
• Country of Publication: United States
• Language: English