Author: Uzun, I.S.
Paper Title Page
MOPGF097 Architecture of Transverse Multi-Bunch Feedback Processor at Diamond 298
 
  • M.G. Abbott, G. Rehm, I.S. Uzun
    DLS, Oxfordshire, United Kingdom
  
  We de­scribe the de­tailed in­ter­nal ar­chi­tec­ture of the Trans­verse Multi-Bunch Feed­back proces­sor used at Di­a­mond for con­trol of multi-bunch in­sta­bil­i­ties and mea­sure­ment of be­ta­tron tunes. Bunch by bunch se­lec­table con­trol over feed­back fil­ters, gain and ex­ci­ta­tion al­lows fine con­trol over feed­back, al­low­ing for ex­am­ple the sin­gle bunch in a hy­brid or camshaft fill pat­tern to be con­trolled in­de­pen­dently from the bunch train. It is also pos­si­ble to ex­cite all bunches at a sin­gle fre­quency while si­mul­ta­ne­ously sweep­ing the ex­ci­ta­tion for tune mea­sure­ment of a few se­lected bunches. The sin­gle fre­quency ex­ci­ta­tion has been used for con­tin­u­ous mea­sure­ment of the beta-func­tion. A sim­ple pro­gram­ma­ble event se­quencer pro­vides sup­port for up to 7 steps of pro­gram­ma­ble sweeps and changes to feed­back and ex­ci­ta­tion, al­low­ing a va­ri­ety of com­plex and pre­cisely timed beam char­ac­ter­i­sa­tion ex­per­i­ments in­clud­ing grow-damp mea­sure­ments in un­sta­ble con­di­tions and pro­grammed bunch clean­ing. Fi­nally input and out­put com­pen­sa­tion fil­ters allow for cor­rec­tion of front end and am­pli­fier phas­ing at higher fre­quen­cies.  
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MOPGF098 PandA Motion Project - A Collaboration Between SOLEIL and Diamond to Upgrade Their 'Position and Acquisition' Processing Platform 302
 
  • I.S. Uzun, T.M. Cobb, A.M. Cousins, M.T. Heron
    DLS, Oxfordshire, United Kingdom
  • Y.-M. Abiven, J. Bisou, P. Monteiro, G. Renaud
    SOLEIL, Gif-sur-Yvette, France
  
  Syn­chro­tron SOLEIL and Di­a­mond Light Source are two third gen­er­a­tion light sources lo­cated re­spec­tively in France and the UK. In the past 5 years, both fa­cil­i­ties sep­a­rately de­vel­oped their own plat­form per­mit­ting en­coder pro­cess­ing to syn­chro­nize mo­tion sys­tems and ac­qui­si­tion dur­ing ex­per­i­ments, SPI­ET­BOX by SOLEIL and Zebra by Di­a­mond. New op­er­a­tional re­quire­ments for si­mul­ta­ne­ous and multi-tech­nique scan­ning, and sup­port of mul­ti­ple en­coder stan­dards have been iden­ti­fied by both in­sti­tutes. In order to ad­dress these a col­lab­o­ra­tive pro­ject has been ini­ti­ated be­tween SOLEIL and Di­a­mond to re­al­ize a new 'Po­si­tion and Ac­qui­si­tion' pro­cess­ing plat­form, called PandA. The PandA pro­ject ad­dresses cur­rent sys­tems' lim­i­ta­tions in term of ob­so­les­cence and need for more pro­cess­ing power. Its de­sign is going to be a 1U stand­alone sys­tem pow­ered by a Xil­inx Zynq SoC to im­ple­ment a con­fig­urable set of logic func­tion­al­i­ties. It will pro­vide a flex­i­ble and open so­lu­tion to in­ter­face dif­fer­ent third party hard­ware (de­tec­tors and mo­tion Con­trollers). This paper de­tails the or­ga­ni­za­tion of this col­lab­o­ra­tion, shar­ing tech­ni­cal lead­er­ship be­tween both in­sti­tutes and the sta­tus of the pro­ject.  
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WEPGF089 CERN Open Hardware Experience: Upgrading the Diamond Fast Archiver 901
 
  • I.S. Uzun, M.G. Abbott
    DLS, Oxfordshire, United Kingdom
  
  Di­a­mond Light Source de­vel­oped and in­te­grated the Fast Archiver into its Fast Orbit Feed­back com­mu­ni­ca­tion net­work in 2009. It en­abled syn­chro­nous cap­ture and archive of the en­tire po­si­tion data in real-time from all Elec­tron Beam Po­si­tion Mon­i­tors (BPMs) and X-RAY BPMs . The FA Archiver so­lu­tion has also been adopted by SOLEIL and ESRF. How­ever, the ob­so­les­cence of the ex­ist­ing PCI Ex­press based FPGA board from Xil­inx and con­tin­u­ing in­ter­est from com­mu­nity forced us to look for a new hard­ware plat­form while keep­ing the back com­pat­i­bil­ity with the ex­ist­ing Linux ker­nel dri­ver and ap­pli­ca­tion soft­ware. This paper re­ports our ex­pe­ri­ence with using the PCIe SPEC board from CERN Open Hard­ware ini­tia­tive as the new FA Archiver plat­form. Im­ple­men­ta­tion of the SPEC-based FA Archiver has been suc­cess­fully com­pleted and re­cently de­ployed at ALBA in Spain.  
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