The interaction region for FIRST (status report) (FIRST meeting at GSI, November 25th 2010 ) Eleuterio Spiriti ( INFN Roma Tre ) Vertex and interaction region detectors requirements The FIRST setup The Air Box in the FIRST target chamber Beam entrance/exit window test Beam monitor status (from A. Paoloni) Start counter status (from A. Paoloni) Beam monitor/start counter schedule (from A. Paoloni) Measured M26 performances on Ions 8. FIRST target and vertex mechanics 9. Vertex cabling and patch panels 10. V1495 FPGA code design 11. JTAG initialization 12. FIRST vertex schedule Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

Vertex (interaction region) detector requirements Carbon beam spot FWHM = 3mm -> Sensor active size in the range of cm2 Angular acceptance as large as possible (protons emitted at large angle) Angular resolution on two tracks separation ~ 0.3 deg (therapy requirements) Carbon interactions in Vertex sensors directly contribute to systematic!!! Overall sensors thickness ~1% of target thickness (~1cm). Angular resolution on two track separation ~ 0.3 deg (Therapy requirement). Carbon interactions in vertex sensors directly contribute to systematic!!! overall sensor thickness to few % of target thickness (~1cm). Dynamic range from 2 to 100 m.i.p. TPC pile-up and Hodo maximum DAQ rate limits the read out rate to few KHz and needed statistic to be collected to reach for desired measure precision fix the read out time to be << 1 ms. Few events superimposed in the Vertex could be disantangled using the beam-monitor position information. Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

The FIRST setup Based on the large pre-existing ALADIN setup Large angle hodoscope ALADIN magnet MUSIC TPC TOF wall Neutron detector beam New interaction region. Beam monitor drift chamber Target Fragments Start counter 150 µm thick M26 vertex Large angle calorimeter Beam Goal: measure Z, A, emission angle and p of all fragments. Small angle calorimeter Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST interaction region “air box” Beam monitor drift chamber and start counter Vertex mechanical structure Target chamber at GSI Beam exit window Beam entrance window Air box exploded view Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST “air box” beam entrance/exit window test Test done at INFN Roma Tre mechanical workshop Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

BEAM MONITOR STATUS (I) Slide from A. Paoloni (LNF) Drift chamber (old prototype) X-Y view : 4 planes per view Exagonal cell: 0.5 cm radius Ar-C02 operation Tested one year ago at LNS 12C beam with good results. Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

BEAM MONITOR STATUS (II) New Beam Monitor: Rectangular Drift Cell (8 mm drift space) Six planes/view Less beam interaction with the wires Less border effect in the space-time relations Tracking redundancy Beam One layer for each view still to be wired (pins to be ordered) Slide from A. Paoloni (LNF) Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

START COUNTER STATUS (I) First Start Counter prototype (100 micron scintillator + fibers read-out) tested at LNS with 12C during 2009: 300 ps resolution, dominated by small amplitude and bad noise rejection. Second Start Counter (150 micron scintillator + scintillator ribbons read-out) tested at LNS with 12C during 2010: bad light collection, due to light leaks in the bendings of the ribbons . Slide from A. Paoloni (LNF) Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

START COUNTER STATUS (II) New Start Counter, 150 micron thick, with radial fibers read-out: ready by the end of February 2011 Support structure Slide from A. Paoloni (LNF) Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

START COUNTER SCHEDULE 4 PMTs ordered End of January 2011 → Mechanics (support + ferrules) ready February 2011 → Fibers gluing 16-20 March 2011 → Test beam validation with Carbon ions and protons at LNS Before the LNS test beam, tests with Am source or BTF (LNF) with electron bunches ? BEAM MONITOR SCHEDULE December 2010 → Cosmic ray test stand to validate Front-end electronics + TDC coupling February 2011 → Test beam with electrons at BTF (LNF) February 2011 → Beam monitor completion (wiring of the last layers) 16-20 March 2011 → Test beam with Carbon ions and protons at LNS Beams: Test beam BTF (500 MeV electrons) Test beam LNS (Carbon ions, protons 80 MeVn) Slide from A. Paoloni (LNF) Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

M26 Proximity Board for FIRST dimensions Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

Test beam setup at INFN LNS Carbon Ion beam collimator. “zero gradi” hall beam line Carbon ion at 62 Mev/u Carbon Ion beam collimator. (33cm from the sensor) Trigger counters M26 sensor Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

Cluster size versus Carbon Ion impinging energy Ten superimposed runs at: 18MeV/u, 27MeV/u, 33MeV/u, 38MeV/u, 60MeV/u; absorber at 1cm and 33 cm A different measurements with and without a 0.95mm thick Aluminium target shows an increase in the background < 10%! Background with absorber (PMMA) at 1cm Background with absorber ( PMMA ) at 33cm Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

Cluster size versus Carbon Ion released charge/impinging energy Light blue region is the cluster size measured for the Am241 alpha ions from ~ 1.4MeV to ~ 5.0MeV. Charge released in 1 µm of silicon by different ions at different energies Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

Stepping motor here to remotely control the target scan M26 vertex detector and target mechanical support 4 different material targets Stepping motor here to remotely control the target scan Exploded views Four TPS_M26_ProximityBoards Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST target and vertex mechanics Side B patch panel Sled movement stepping motor Ion beam Four vertex stations Side A patch panel Five sled target housings Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST vertex patch panel an cabling prototype Patch panels prototypes Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST vertex patch panel an cabling prototype Patch panels prototypes Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST vertex patch panel an cabling prototype Patch panels prototypes Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

frames stored for each trigger Trigger mode data format FIRST vertex detector DAQ status V1495 VME board FPGA code to readout 4 M26 sensors 4 M26 data deserializer Three consecutive frames stored for each trigger Trigger mode data format (32 bits words) HEADER TRIGGER_COUNTER TimeStamp FrameCounter Word Number in frame Data .......... TRAILER VME JTAG programming ready Software to be developed!!!!!!!!! Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST vertex detector DAQ status (JTAG hardware) Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

FIRST vertex schedule ( VERY OPTIMISTIC!!!! ) Entrance/exit window design: this week? Entrance/exit window test: December? Mechanic Air Box design: end January 2011? Mechanic Air Box costruction: end February 2011? Target/vertex mechanics: end March 2011? M26 gluing on 4 stations ( Strasbourg ) this week M26 bonding on 4 stations ( Strasbourg ) end November 2010 Patch panel PCB design underway December 2010 Patch panel PCB production January 2011 DAQ V1495 ( JTAG? ) end 2010 MBS vertex readout February 2011 Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

J.Baudot talk at IEEE-NSS09 conference Eleuterio Spiriti FIRST meeting GSI, 25-11-2010

M26 proximity board with mechanical support Eleuterio Spiriti FIRST meeting GSI, 25-11-2010