Abstract
The upcoming commissioning of the superconducting (SC) continuous wave Helmholtz linear accelerators first of series cryomodule is going to demand precise alignment of the four internal SC cavities and two SC solenoids. For optimal results, a beam-based alignment method is used to reduce the misalignment of the whole cryomodule, as well as its individual components. A symmetric beam of low transverse emittance is required for this method, which is to be formed by a collimation system. It consists of two separate plates with milled slits, aligned in the horizontal and vertical direction. The collimation system and alignment measurements are proposed, investigated, and realized. The complete setup of this system and its integration into the existing environment at the GSI High Charge State Injector are presented, as well as the results of the recent reference measurements.
Highlights
The scientific research for new Super-Heavy Elements (SHEs) performs collision experiments on fixed heavy-ion targets with medium to heavy mass projectiles
The Helmholtz Linear Accelerator (HELIAC), dedicated to deliver beam to SHE experiments, is going to be built at GSI: a continuous wave (CW) and superconducting (SC) heavy ion accelerator with variable output energy,9–11 consisting of a normal-conducting injector linac and a superconducting main part, comprising four cryomodules
A new collimation system for the heavy ion CW SC 1.4 MeV/u HELIAC Advanced Demonstrator has been designed, fabricated, and successfully commissioned. It provides for a thin transverse beam of low divergence, with an emittance in the region of only 2 mm mrad
Summary
The scientific research for new Super-Heavy Elements (SHEs) performs collision experiments on fixed heavy-ion targets with medium to heavy mass projectiles. The Helmholtz Linear Accelerator (HELIAC), dedicated to deliver beam to SHE experiments, is going to be built at GSI: a continuous wave (CW) and superconducting (SC) heavy ion accelerator with variable output energy, consisting of a normal-conducting injector linac and a superconducting main part, comprising four cryomodules.. The Helmholtz Linear Accelerator (HELIAC), dedicated to deliver beam to SHE experiments, is going to be built at GSI: a continuous wave (CW) and superconducting (SC) heavy ion accelerator with variable output energy, consisting of a normal-conducting injector linac and a superconducting main part, comprising four cryomodules.11 This project is realized by GSI and the Helmholtz Institute Mainz (HIM) under the key support of the Goethe University Frankfurt (GUF) and in collaboration with the Moscow Engineering Physics Institute (MEPhI).
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