SIMULATION OF PELLET TARGET EXPERIMENTS WITH BETACOOL CODE

A. Smirnov¹, A. Sidorin¹, D. Krestnikovª¹, R. Pivin¹, D. Prasuhn², M. Wolke²

¹Joint Institute for Nuclear Research, Dubna, Russia

²Institut für Kernphysik, Forschungszentrum Jülich GmbH, Jülich, Deutsch

Abstract

In last years at GSI (Germany) new accelerator complex project FAIR is being realized. One of the most important goals of this project is caring out an experiment with internal target PANDA [1]. The only way to achieve design luminosity value is to use a pellet target. However, such a target is coming up with short-scale luminosity variation. Peak to mean luminosity ratio can reach a big value unacceptable for detector.

A numerical simulation of this experiment is connected to two different time-scale processes. The first one is the short-time process, which describes luminosity variations while one pellet is crossing the beam. This process can be about tenths microsecond long. The long-time process of the beam parameter evolution (particle number, transverse and longitudinal profiles) are defined by the beam losses and equilibrium between target heating and electron cooling.

This article presents the numerical simulations with BETACOOL code [2] which allows solving both these tasks.

ª – corresponding author

Paper 

9

SIMULATION STUDY OF STABLE AND MOVING BARRIER BUCKETS USING BETACOOL CODE

A. Smirnov, A. Sidorin, R. Pivinª, D. Krestnikov

Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, Tomsk State University, Tomsk, Russia

Abstract

A moving barrier RF bucket is an effective ion beam accumulation method used, for instance, in Fermilab's Recycler and proposed for NESR at FAIR project. A possible application of a stationary RF bucket is to compensate an ionization energy loss in experiments with an internal target. The ionization energy loss is the main physical effect limiting the experiment duration. The barrier bucket application permits to sufficiently decrease of a required power of a cooling system when a high resolution in an experiment is necessary[1].

Recently a new program was developed for barrier RF bucket simulation for FAIR rings [2]. To compare predictions of different models and to estimate efficiency of the barrier bucket application in internal target experiments the new algorithms were implemented into Betacool program [3] also.

ª – corresponding author

Paper 

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