Author: Cucini, R.
Paper Title Page
TUP085 FERMI Status Report 564
 
  • M. Svandrlik, E. Allaria, F. Bencivenga, C. Callegari, F. Capotondi, D. Castronovo, P. Cinquegrana, M. Coreno, R. Cucini, I. Cudin, G. D'Auria, M.B. Danailov, R. De Monte, G. De Ninno, P. Delgiusto, A.A. Demidovich, S. Di Mitri, B. Diviacco, A. Fabris, R. Fabris, W.M. Fawley, M. Ferianis, E. Ferrari, P. Finetti, L. Fröhlich, P. Furlan Radivo, G. Gaio, D. Gauthier, F. Gelmetti, L. Giannessi, M. Kiskinova, S. Krecic, M. Lonza, N. Mahne, C. Masciovecchio, M. Milloch, F. Parmigiani, G. Penco, L. Pivetta, O. Plekan, M. Predonzani, E. Principi, L. Raimondi, P. Rebernik Ribič, F. Rossi, L. Rumiz, C. Scafuri, C. Serpico, P. Sigalotti, C. Spezzani, C. Svetina, M. Trovò, A. Vascotto, M. Veronese, R. Visintini, D. Zangrando, M. Zangrando
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  
  FERMI, the seeded FEL lo­cated at the Elet­tra lab­o­ra­tory in Tri­este, Italy, is now in reg­u­lar op­er­a­tion for users with its first FEL line, FEL-1, which cov­ers the wave­length range be­tween 100 and 20 nm. We will give an overview of the typ­i­cal op­er­at­ing modes of the fa­cil­ity for users and we will re­port on the sta­tus of beam­lines and ex­per­i­men­tal sta­tions. Three beam­lines are now opened for users, three more are in con­struc­tion. Mean­while, the sec­ond FEL line of FERMI, FEL-2, a HGHG dou­ble stage cas­cade cov­er­ing the wave­length range 20 to 4 nm is still under com­mis­sion­ing; we will re­port on the lat­est re­sults in par­tic­u­lar at the short­est wave­length, 4 nm in the fun­da­men­tal.  
 
TUP097 Fast, Multi-band Photon Detectors based on Quantum Well Devices for Beam-monitoring in New Generation Light Sources 600
 
  • T. Ganbold
    University of Trieste, School of Nanotechnology, Trieste, Italy
  • M. Antonelli, G. Cautero, R. Cucini, D.M. Eichert, W.H. Jark, R.H. Menk
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • G. Biasiol
    IOM-CNR, Trieste, Italy
  
  In order to mon­i­tor the pho­ton-beam po­si­tion for both di­ag­nos­tics and cal­i­bra­tion pur­poses, we have in­ves­ti­gated the pos­si­bil­ity to use In­GaAs/In­AlAs Quan­tum Well (QW) de­vices as po­si­tion-sen­si­tive pho­ton de­tec­tors for Free-Elec­tron Laser (FEL) or Syn­chro­tron Ra­di­a­tion (SR). Owing to their di­rect, low-en­ergy band gap and high elec­tron mo­bil­ity, such QW de­vices may be used also at Room Tem­per­a­ture (RT) as fast multi-band sen­sors for pho­tons rang­ing from vis­i­ble light to hard X-rays. More­over, in­ter­nal charge-am­pli­fi­ca­tion mech­a­nism can be ap­plied for very low sig­nal lev­els, while the high car­rier mo­bil­ity al­lows the de­sign of very fast pho­ton de­tec­tors with sub-nanosec­ond re­sponse times. Seg­mented QW sen­sors have been pre­lim­i­nary tested with 100-fs-wide UV laser pulses and X-ray SR. The re­ported re­sults in­di­cate that these de­vices re­spond with 100-ps rise-times to ul­tra-fast UV laser pulses. Be­sides, X-ray tests have shown that these de­tec­tors are sen­si­tive to beam po­si­tion and ex­hibit a good ef­fi­ciency in the col­lec­tion of photo-gen­er­ated car­ri­ers.  
 
FRA02 Wave-Mixing Experiments with Multi-colour Seeded FEL Pulses 985
 
  • F. Bencivenga, A. Battistoni, F. Capotondi, R. Cucini, M.B. Danailov, G. De Ninno, M. Kiskinova, C. Masciovecchio
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  
  The ex­ten­sion of wave-mix­ing ex­per­i­ments in the ex­treme ul­tra­vi­o­let (EUV) and x-ray spec­tral range rep­re­sents one of the major break­throughs for ul­tra­fast x-ray sci­ence. Es­sen­tial pre­req­ui­sites to de­velop such kind of non-lin­ear co­her­ent meth­ods are the strength of the input fields, com­pa­ra­ble with the atomic field one, as well as the high tem­po­ral co­her­ence and sta­bil­ity of the pho­ton source(s). These char­ac­ter­is­tics are eas­ily achiev­able by op­ti­cal lasers. Seeded free-elec­tron-lasers (FELs) are sim­i­lar in many re­spects to con­ven­tional lasers, hence call­ing for the de­vel­op­ment of wave-mix­ing meth­ods. At the FERMI seeded FEL fa­cil­ity this am­bi­tious task is tack­led by the TIMER pro­ject, which in­cludes the re­al­iza­tion of a ded­i­cated ex­per­i­men­tal end-sta­tion. The wave-mix­ing ap­proach will be ini­tially used to study col­lec­tive atomic dy­nam­ics in dis­or­dered sys­tems and nanos­truc­tures, through tran­sient grat­ing (TG) ex­per­i­ments. How­ever, the wave­length and po­lar­iza­tion tun­abil­ity of FERMI, as well as the pos­si­bil­ity to ra­di­ate multi-colour seeded FEL pulses, would allow to ex­pand the range of pos­si­ble sci­en­tific ap­pli­ca­tions.  
slides icon Slides FRA02 [7.731 MB]