Abstract
A beam diagnostic made of a double sheet sensor is designed measure ions emitted by an electron-photon conversion target under the impact of an intense relativistic electron beam. This device is tested on the PIVAIR prototype accelerator. Signals attributed to ions emitted from the target are observed for different target elements: Ta, C, Ti, Au and light species are identified by their time of flight. The mean velocities of C/sup +/ and H/sup +/ ions are found to be respectively equal to 1.2 /spl times/10/sup 8/ cm/s and 5 /spl times/10/sup 8/ cm/s for C and Ta targets. The ionic appearance and rise time signals are closed to the expected values. Besides, the current signals are characterized by a plateau to which level corresponds to the Child-Langmuir current (25 A for H/sup +/ ions). Furthermore, the fall-off of this signal is found to be in synchronism with the electron beam signal. This behaviour represents the deconfinement of the ion beam under the effect of its own space charge. These experimental results confirm the preliminary calculations obtained with the M2V Maxwell-Vlasov PIC code which has been coupled with an ionic emission model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
