Conveners
Managing Extraction Efficiency: II
- David Ondreka (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))
The current beam power for the user operation in J-PARC MR's slow extraction beam is 64 kW. After the beam operation at this beam intensity, the on-contact residual radiation dose rate with a cooling time of 6.5 h exceeded 10 mSv/h around the ESS. To further increase the beam intensity while keeping the maintainability of the devices, further reduction of the beam loss is essential. Thus we...
Mu2e experiment, searching for a super rare mode of the CLFV decay of muon into an electron is in preparation for data taking at Fermilab’s Muon Campus facility. The experiment requires the 8 GeV proton beam continuous delivery aided by the Slow Extraction (SX) from the Delivery Ring. The first beam commissioning of the SX has been scheduled for FY2024. However, there was a possibility to...
Slow extraction is an unavoidably lossy process. Primary particles are deemed to intercept the electrostatic septum wires while separating the extracted from the circulating beam. Over the last years, a technique to reduce septum losses has been proposed at CERN for the SPS: shadowing of electrostatic septum via Silicon bent crystals. Very promising results both in dedicated measurements...
Uncontrolled beam loss at the electrostatic septum is a performance limit for hadron accelerators delivering slow-extracted beam to fixed-target experiments. The application of numerical optimizers has been shown to reduce such beam loss. The efficiency depends on the parameters to optimize, the details of the extraction process and the used hardware. In this presentation, the minimization of...
The synchrotrons SIS18 and SIS100 at GSI/FAIR uses resonant extraction for slow beam extraction. The electrostatic extraction septa (ES) utilizes thin wire arrays as anode, which are sensitive to beam loss, especially at low beam energies and for heavy ions, where the energy loss dE/dx is high. Beam loss can lead to high temperatures, where the anode wires break due to reduced mechanical...
The synchrotrons SIS18 and SIS100 at GSI/FAIR uses resonant extraction for slow beam extraction. The electrostatic extraction septa (ES) utilizes thin wire arrays as anode, which are sensitive to beam loss, especially at low beam energies and for heavy ions, where the energy loss dE/dx is high. Beam loss can lead to high temperatures, where the anode wires break due to reduced mechanical...
Uncontrolled beam loss at the electrostatic septum is a performance limit for hadron accelerators delivering slow-extracted beam to fixed-target experiments. The application of numerical optimizers has been shown to reduce such beam loss. The efficiency depends on the parameters to optimize, the details of the extraction process and the used hardware. In this presentation, the minimization of...
The SESRI facility, known as the Space Environment Simulation and Research Infrastructure, was successfully completed in Harbin, China, in 2022. It stands as a comprehensive ion species facility exclusively dedicated to space environment simulation and associated scientific research.
During the design and construction phases of SESRI, two major challenges were encountered. To effectively...
In the accelerator applications of slow extraction for High Energy Physics (HEP), one of the prime challenges is the mitigation of beam losses, which is becoming increasingly critical with the continuous rise in beam power. One of the very effective methods to mitigate proton beam losses in Slow Extraction is crystal channeling. After successful implementation of this method at CERN with...
