RFOFO ring cooler

Abstract

This note describes the design of an ionization cooling ring that uses an alternating polarity solenoid lattice. The ring is approximately 33 m in circumference and has 12 cells. Each cell has two opposing focusing solenoids placed either side of a hydrogen wedge absorber. The solenoid coils are located outside pillbox rf cavities. Bending is provided by tipping the solenoid coils. The simulated merit factor (≈ the increase in six-dimensional phase-space density) is 81.

Constraint on the astrophysicalNe18(α,p)Na21<

“…The excitation energies from the present work and Refs. [9][10][11][12]16] are summarized in Table I. Our excitation energies agree well with Refs.…”

“…The levels in 22 Mg have been studied many times [8][9][10][11][12][13]: more than 40 levels have been observed (9 within 1 MeV) above the α threshold. Despite those studies, however, only the excitation energies are known for most levels with no constraints on the spins.…”

“…Excitation energies in 22 Mg extracted from present work and Refs [9][10][11][12]16]. are summarized.…”

Ionization cooling ring for muons

“…At present the most realistic modeling of a cooling ring has been done for the RFOFO cooling ring [9][10][11][12]. The FOFO part of the name refers to the focusing-driftfocusing nature of the solenoid lattice, in analogy to the FODO lattice for quadrupole channels.…”

RFOFO Cooling Ring: Simulation Results

“…Current baseline designs make use of linear channels that only cool the beam in transverse phase space. At present the most realistic modeling has been done for the RFOFO ring [4][5][6][7]. At present the most realistic modeling has been done for the RFOFO ring [4][5][6][7].…”