WG1003
HZB, Berlin, Germany
JLAB, Newport News, Virginia, USA
NCBJ, Świerk/Otwock, Poland
DESY, Hamburg, Germany
BNL, Upton, Long Island, New York, USA
MBI, Berlin, Germany
For the energy recovery linac (BERLinPro) at the Helmholtz-Zentrum-Berlin (HZB) a high brightness, high average current electron source is to be developed. As a first step an all superconducting radio-frequency (SRF) photoinjector is now in operation. The aim is to demonstrate electron beam produced from a Nb 1.6 cell superconducting gun with a Pb cathode coated on the cavity back wall. The setup of the source and first results from beam measurements are presented. An outlook on the final SRF photoinjector and its drive laser will be given.
WG2008
HZB, Berlin, Germany
The Helmholtz-Zentrum für Materialien und Energie GmbH proposed to build a compact superconducting Energy Recovery Linac intended as a technology demonstrator in 2008. The project was approved in late 2010. Following a financially motivated 'design to cost' decision in May 2011 the necessary hardware changes have been incorporated into the design during the last months. The maximal energy has been lowered to 50MeV resulting in a shortening of the accelerating structures. A maximal current of 100mA with a normalized emittance of 1 mm mrad still remains the scientific goal of the project. The updated layout of the machine, features for bunch compression and for BBU suppression will be presented. Special emphasis is laid on the impact of a short pulse option on the optics.
WG2024
HZB, Berlin, Germany
Following funding approval late 2010, Helmholtz-Zentrum Berlin officially started Jan. 2011 the design and construction of the Berlin Energy Recovery Linac Project BERLinPro. The main goal of this compact ERL is to develop the ERL accelerator physics and technology required to accelerate a high-current (100 mA) low emittance beam (1 mm'mrad normalized), as required for future ERL-based synchrotron light sources. Given the flexibility ERLs provides, a short bunch operation mode will also be investigated. The sources of emittance growth in the BERLinPro injector are discussed. The injection energy in an ERL is usually rather low to decrease power consumption and avoid activation of the beam dump. Due to this the space charge is the main reason of emittance degradation in injector. The implementation of emittance compensation scheme in the injector is necessary to achieve low emittance. Since ERL injector's optics is axially non-symmetric, the 2D- emittance compensation scheme [*] is proposed to be used.
* S.V. Miginsky. Emittance compensation of elliptical beam. NIM A 603 (2009), pp 32-34.