DIPAC2011 - List of Keywords (factory)

Paper	Title	Other Keywords	Page
MOPD10	A Calibration Method for the RF Front-end Asymmetry of the DBPM Processor	target, controls, pick-up, instrumentation	56
	X. Yi, L.W. Lai, Y.B. Leng, Y.B. Yan, N. Zhang SSRF, Shanghai, People's Republic of China Z.C. Chen SINAP, Shanghai, People's Republic of China
	Digital Beam Position Monitor (DBPM) processor, designed to measure the beam positions in the LINAC, booster and the storage ring of a particle accelerator, has been used in many synchrotron radiation facilities. Channels asymmetry, which deteriorates the performance of the DBPM, is inevitable since the RF front-end needs four exactly same blocks. Recently, an RF front-end board for DBPM has been made with calibration circuit which clears the switching noise. The calibration method will be described in detail, including an overview of the RF board. The beam current dependence, which is sensitive to channels asymmetry, decreases from 160μm to 25μm after the calibration in the lab test.
	Poster MOPD10 [1.682 MB]

TUOB01	Options for Next Generation Digital Acquisition Systems	controls, instrumentation, target, insertion	289
	A. Boccardi CERN, Geneva, Switzerland
	Digital acquisition system designers have an always increasing number of options in terms of bus standards and digital signal processing hardware among which to choose. This allows for a high flexibility but also open the door to a proliferation of different architectures, potentially limiting the reusability and the design synergies among the various instrumentation groups. This contribution illustrates the design trends in some of the major institutes around the world with design examples including VME, PCI and μTCA based modular systems using AMC and/or FMC mezzanines. Some examples of FPGA design practices aimed to increase reusability of code will be mentioned together with some of the tools already available to designers to improve the information exchange and the collaboration, like the Open Hardware Repository project.
	Slides TUOB01 [3.543 MB]

TUPD60	Optical Diagnostics for Frankfurt Neutron Source	emittance, diagnostics, simulation, neutron	443
	H. Reichau, O. Meusel, U. Ratzinger, C. Wagner IAP, Frankfurt am Main, Germany
	A non-interceptive optical diagnostic system on the basis of beam tomography, was developed for the planned Frankfurt Neutron Source (FRANZ). The proton driver linac of FRANZ will provide energies up to 2.0 MeV. The measurement device will non-interceptively derive required beam parameters at the end of the LEBT at beam energies of 120 keV and a current of 200 mA. On a narrow space of 351.2 mm length a rotatable tomography tank will perform a multi-turn tomography with a high and stable vacuum pressure. The tank allows to plug different measurement equipment additionally to the CCD Camera installed, to perform optical beam tomography. A collection of developed algorithms provides information about the density distribution, shape, size, location and emittance on the basis of CCD images. Simulated, as well as measured data have been applied to the evaluation algorithms to test the reliability of the beam. The actual contribution gives an overview on the current diagnostic possibilities of this diagnostic system.
	Poster TUPD60 [1.886 MB]

Paper

Title

Other Keywords

Page

MOPD10

A Calibration Method for the RF Front-end Asymmetry of the DBPM Processor

target, controls, pick-up, instrumentation

56

X. Yi, L.W. Lai, Y.B. Leng, Y.B. Yan, N. Zhang
SSRF, Shanghai, People's Republic of China
Z.C. Chen
SINAP, Shanghai, People's Republic of China

Digital Beam Position Monitor (DBPM) processor, designed to measure the beam positions in the LINAC, booster and the storage ring of a particle accelerator, has been used in many synchrotron radiation facilities. Channels asymmetry, which deteriorates the performance of the DBPM, is inevitable since the RF front-end needs four exactly same blocks. Recently, an RF front-end board for DBPM has been made with calibration circuit which clears the switching noise. The calibration method will be described in detail, including an overview of the RF board. The beam current dependence, which is sensitive to channels asymmetry, decreases from 160μm to 25μm after the calibration in the lab test.

Poster MOPD10 [1.682 MB]

TUOB01

Options for Next Generation Digital Acquisition Systems

controls, instrumentation, target, insertion

289

A. Boccardi
CERN, Geneva, Switzerland

Digital acquisition system designers have an always increasing number of options in terms of bus standards and digital signal processing hardware among which to choose. This allows for a high flexibility but also open the door to a proliferation of different architectures, potentially limiting the reusability and the design synergies among the various instrumentation groups. This contribution illustrates the design trends in some of the major institutes around the world with design examples including VME, PCI and μTCA based modular systems using AMC and/or FMC mezzanines. Some examples of FPGA design practices aimed to increase reusability of code will be mentioned together with some of the tools already available to designers to improve the information exchange and the collaboration, like the Open Hardware Repository project.

Slides TUOB01 [3.543 MB]

TUPD60

Optical Diagnostics for Frankfurt Neutron Source

emittance, diagnostics, simulation, neutron

443

H. Reichau, O. Meusel, U. Ratzinger, C. Wagner
IAP, Frankfurt am Main, Germany

A non-interceptive optical diagnostic system on the basis of beam tomography, was developed for the planned Frankfurt Neutron Source (FRANZ). The proton driver linac of FRANZ will provide energies up to 2.0 MeV. The measurement device will non-interceptively derive required beam parameters at the end of the LEBT at beam energies of 120 keV and a current of 200 mA. On a narrow space of 351.2 mm length a rotatable tomography tank will perform a multi-turn tomography with a high and stable vacuum pressure. The tank allows to plug different measurement equipment additionally to the CCD Camera installed, to perform optical beam tomography. A collection of developed algorithms provides information about the density distribution, shape, size, location and emittance on the basis of CCD images. Simulated, as well as measured data have been applied to the evaluation algorithms to test the reliability of the beam. The actual contribution gives an overview on the current diagnostic possibilities of this diagnostic system.

Poster TUPD60 [1.886 MB]