W. Pellico

Study report of the booster transition jump system

There are more than 15 years since the transition-jump system (TJS) was installed. Because of the quad steering, which is caused by the beam not being well centered through all the {gamma}{sub T} quads, the TJS has never been used in the operation. Based upon the recent calculation, the short 12 {gamma}{sub T} quad had the worst offset in the vertical direction, and it was lowered 4 mm. Afterwards, the orbit error caused by the {gamma}{sub T} quad steering has been largely removed, and this encourages our efforts of commissioning the TJS to reach its design goal.

Booster 6-GeV Study

A wider aperture, which has been obtained along the Booster beam line recently, brings the opportunity to run beams with the intensity higher than ever before. Sooner or later, the available RF accelerating voltage will become a new limit for the beam intensity. Extra accelerating voltages can be achieved either by increasing the RFSUM or by reducing the accelerating rate via a slower acceleration, and this motivates the 6-GeV study.

Reducing the momentum spread of 8-GeV proton beam via the bunch rotation in Booster

It requires Booster to be able to deliver 8-GeV proton beams to Main Injector at the intensity of 4.5 x 10{sup 12} per batch with a longitudinal emittance of 0.12 eV {center_dot} sec and a momentum spread ({Delta}p) of 18 MeV in order to achieve the antiproton production rate of 24 x 10{sup 10} per hour. Bunch rotation via the RFSUM reduction at the end of a cycle has been implemented to reach the goal. Afterward, it is important for us to develop diagnostic tools and tuning capabilities to make bunch rotation operationally reliable.