## AIRIS Design Parameters

The three main components of AIRIS include a momentum achromat, an RF sweeper, and a buncher/rebuncher resonator. The design considered a number of variables, including large transmission and acceptance of secondary beams produced in-flight, suppression of the unreacted primary beam, and allowance for stable beam tunes through the device when it is not in use.

Information on each sub-section is below.

### Momentum Achromat

A block diagram of the magnetic chicane, which resides between two sets of quadrupole doublets, is shown below along with a table of detailed paramters.

Parameter | Value | Units |
---|---|---|

Total Length | 6.6 | m |

Angular Acceptance | 75 | mrad |

Momentum Dispersion at Mid-Plane | 1.2 | mm/% |

Dipole Bend Angle | 22.5 | degrees |

Dipole Radius | 1 | m |

Dipole Full Gap | 8 | cm |

Dipole Max Field | 1.75 | T |

Quadrupole Full Aperture | 15 | cm |

Quadrupole Length | 20 | cm |

Quadrupole Max Field | 1 | T |

### Buncher/Debuncher Resonator

Bunching or Debunching of the secondary beam can be performed by a superconducting cavity. The parameters of the cavity used for the design and transmission calculations are below.

Parameter | Value | Units |
---|---|---|

Aperture | 3.8 | cm |

Frequency | 72.75 | MHz |

Maximum Voltage | 3 | MV |

Cavity Beta | 0.075 |

### RF Sweeper

The RF sweeper provides contaminant beam reduction through velocity differences (time-of-flight separation). The parameters below have been used in the design and transmission calculations are below. They are based on the current ATLAS operating sweeper.

Parameter | Value | Units |
---|---|---|

Electrode Length | 1 | m |

Frequency | 6.0625 | MHz |

Maximum Voltage | 70 | kV |