Engineering topics

Pellegrino, L

Publications and source records attributed to Pellegrino, L.

4 records

DOE OSTI2012

The SuperB Project: Accelerator Status and R&D

The SuperB collider project has been recently approved by the Italian Government as part of the National Research Plan. SuperB is a high luminosity (10{sup 36} cm{sup -2} s{sup -1}) asymmetric e{sup +}e{sup -} collider at the {Upsilon}(4S) energy. The design is based on a 'large Piwinski angle and Crab Waist' scheme already successfully tested at the DAPHNE {Phi}-Factory in Frascati, Italy. The project combines the challenges of high luminosity colliders and state-of-the-art synchrotron light sources, such as two beams (e{sup +} at 6.7, HER, and e{sup -} at 4.2 GeV, LER) with extremely low emittances and small beam sizes at the Interaction Point. As unique features, the electron beam will be longitudinally polarized at the IP and the rings will be able to ramp down to collide at the {tau}/charm energy threshold with a luminosity of 10{sup 35} cm{sup -2} s{sup -1}. The relatively low beam currents (about 2 A) will allow for low running (power) costs compared to similar machines. The insertion of beam lines for synchrotron radiation (SR) users is the latest feature included in the design. The lattice has been recently modified to accommodate insertion devices for X-rays production.

43 PARTICLE ACCELERATORS↗

DOE OSTI2012

Results From the DAFNE High Luminosity Test

The DAPHNE collider, based on a new collision scheme including Large Piwinsky angle and Crab-Waist, has been successfully commissioned and is presently delivering luminosity to the SIDDHARTA detector. Large crossing angle and Crab-Waist scheme proved to be effective in: (1) Increasing luminosity, now a factor 2.7 higher than in the past; and (2) controlling transverse beam blow-up due to the beam-beam. Work is in progress to reach the ultimate design luminosity goal 5.0 {center_dot} 10{sup 32} cm{sup -2}s{sup -1}. The new collision scheme is the main design concept for a new project aimed at building a Super-B factory that is expected to achieve a luminosity of the order of 10{sup 36} cm{sup -2} s{sup -1} and it has been also taken into account to upgrade one of the LHC interaction regions.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

DOE OSTI2011

Crab Waist Collision at DAFNE

DAFNE is an accelerator complex consisting of a double ring lepton collider working at the c.m. energy of the {Phi}-resonance (1.02 GeV) and an injection system. In its original configuration the collider consisted of two independent rings, each {approx}97 m long, sharing two 10 m long interaction regions (IR1 and IR2) where the KLOE and FINUDA or DEAR detectors were respectively installed. A full energy injection system, including an S-band linac, 180 m long transfer lines and an accumulator/damping ring, provides fast and high efficiency electron positron injection also in topping-up mode during collisions. Recently the DAFNE collider has been upgraded in order to implement a new collision scheme based on large Piwinski angle and cancellation of the synchro-betatron resonances by means of electromagnetic sextupoles (Crab-Waist compensation). The novel approach has proved to be effective in improving beam-beam interaction and collider luminosity.

43 PARTICLE ACCELERATORS↗

DOE OSTI2011

DAFNE Status Report

DAFNE, the Frascati {Phi}-factory, is providing an increasing peak and integrated luminosity for the KLOE experiment. Such improvements, together with a background reduction in the KLOE detector, have been obtained after continuous machine studies. An increase of the single bunch luminosity has been achieved essentially by the reduction of the effects of machine non-linearities. The integrated luminosity was improved by the capability of topping up the beam currents while keeping the KLOE detector on, together with an increase of the stored currents.

43 PARTICLE ACCELERATORS↗