Superbunch Hadron Colliders

Abstract

A novel concept of a high luminosity hadron collider is proposed. This would be a typical application of an induction synchrotron being newly developed. Extremely long bunches, referred to as superbunches, are generated by a multibunch stacking method employing barrier buckets at the injection into the collider and are accelerated with a step voltage induced in the induction gaps. Superbunches intersect with each other, yielding a luminosity of more than 10(35) cm(-2) sec(-1). A combination of vertical crossing and horizontal crossing must be employed in order to avoid any significant beam-beam tune shift.

Test of “Crab-Waist” Collisions at theDAΦNEΦFactory

“…Moreover, the horizontal tune shift x drops like 1= z . However, unlike [12,13], in the present crab-waist scheme the Piwinski angle is increased by decreasing the horizontal beam size and increasing the crossing angle. In this way we can gain in luminosity as well, and the horizontal tune shift decreases.…”

“…It has been also proposed for hadron colliders [12,13] to increase the bunch length and the crossing angle. In such a case, if it were possible to increase N proportionally to z , the vertical tune shift y would remain constant, while the luminosity would grow proportionally to z ; see (1).…”

Luminosity Increase at the Incoherent Beam-Beam Limit in RHIC

“…In Refs. [3,4] induction devices are discussed for acceleration. These may be an alternative solution.…”

“…[4,[10][11][12]]. An alternative acceleration scheme is based on induction devices [3,4]. Let = E − E s denote the energy deviation for a given particle and let τ denote its arrival time with respect to the synchronous particle.…”

“…Extremely long bunches, called superbunches, are the basis of recently proposed hadron collider concept [3]. In this proposal, beam is stacked in very long bunches using barrier cavities, and accelerated with an induction device [4].…”