Status of the TOTEM experiment at LHC.

Status of the TOTEM experiment at LHC.
F.S. Cafagna INFN Bari division

Analysis status Final Draft on its way to be circulated. 2.76 TeV Cross Section has been completed and article is in progress. 13 TeV Cross Section analysis well advanced. Hadronic-Coulomb interference studies with data at *=2.5 km extremely fast progress. Low mass resonances studies and Glueballs searches with diffractive events (jointly with CMS). CT-PPS data analysis on-going. Central Exclusive Production. mm exclusive production analysis almost finalized gg exclusive production analysis in progress Missing mass searches First CT-PPS paper Observation of proton-tagged, central semi-exclusive production of high-mass lepton pairs at 13 TeV with the CMS-TOTEM Precision Proton SpectrometerCMS PAS PPS TOTEM-NOTE F.S. Cafagna, CNS1 13th of September 2017

F.S. Cafagna, CNS1 13th of September 2017
TOTEM run strategy in 2017 IP5 Sec.5-6 Extend the successful experience of 2016 with CT-PPS Insertion of 3 Horizizontal RP for each side with 4 detector technologies: 2 tracking: Si-Strip (210-FAR), Pixel (220-FAR) 2 timing: hybrid Diamond + UFSD (cylindrical pot) Preparatory dedicated run for alignment and validation 4 additional vertical pots inserted (in blue) to align the sensors w.r.t. the beam (elastic scattering events) RP-210 NEAR insertion validation F.S. Cafagna, CNS1 13th of September 2017

Courtesy of V. Avati & G. Antchev
F.S. Cafagna, CNS1 13th of September 2017

Status after EYETS CT-PPS spectrometer is taking data with 4 detector technologies Si-Strips and Si-Pixels allowing tracking with improved resolution and radiation hardness; Diamonds and UFSD allowing timing measurements. DAQ commissioning done with CMS central detector, all TOTEM & CT-PPS detectors latencies has been re-evaluated and assigned. First alignment run performed. Some more data are needed for the elastic scattering alignment. F.S. Cafagna, CNS1 13th of September 2017

Timing detectors Diamond detectors, in operation in the horizontal pots, proven that their intrinsic radiation hardness is suitable to be used during high luminosity runs. Moreover R&D on double diamond, reaching an improved time resolution of 50ps, show that this solution is suitable to be used in CT-PPS and can be implemented in 2018. Diamond hybrid design, has been adapted to be used for USFD which are actually taking data in the horizontal pots. Using them in the vertical, during special runs, will significantly reduce the radiation damage risk. F.S. Cafagna, CNS1 13th of September 2017

Stato della Collaborazione
La decisione presa da TOTEM, all’inizio del 2016, di “sacrificare” una parte dei rivelatori Si-strips delle RP orizzontali e di modificare gli ibridi dei diamanti per poterli installare nelle RP orizzontali, ha dato una decisiva spinta a CT-PPS. Questo, se da un lato ha tenuto tutta la collaborazione impegnata e concentrata su tutte le attività legate allo sviluppo ed installazione dei necessari adattamenti dei rivelatori e delle infrastrutture, da l’altro ha permesso una presa dati ad alta luminosità durante questi due anni. La collaborazione TOTEM nel suo complesso e stabile e si stà formalizzando in questi giorni l’ingresso della Università di Tomsk (Russia). F.S. Cafagna, CNS1 13th of September 2017

Responsabilità italiane
T1 hardware and Software Ferro, Robutti (GE) Trigger & T2 project leader Turini (PI-SI) Test-beam coordinator Bozzo (Ge) Editorial Board members Bozzo, Ferro (GE) – Berardi (BA) Deputy Spokesperson DAQ & clock project leader Cafagna (BA) Resource Coordinator Radicioni (BA) Collaboration Board Chairman Scribano (PI-SI) Editorial Board Chairman Catanesi (BA) F.S. Cafagna, CNS1 13th of September 2017

Le richieste per il 2018 Rivelatori di Timing Si richiede la produzione di ibridi per le installazioni dei rivelatori USFD nelle verticali, è necessario produrre una altra partita di schede di front-end e relative spare. R&D per nuovo T2 La richiesta è relativa ad un prototipo di scintillatore e SiPM di lettura, da installare nell'area di test-beam di TOTEM. Distribuzione del clock. Richiediamo due alimentatori, con precisione migliore del percento, per i regolatori di bias dei modulatori elettro-ottici Mach-Zehnder. Dalle misure in laboratorio ci siamo accorti che la pulizia dell'alimentazione è importante ai fini della riduzione del rumore indotto nel modulatore dal sistema di controllo. Riflettori DWDM FBG. Purtroppo due riflettori di sono danneggiati, durante le fasi di test in laboratorio e commissioning in IP5, ed abbiamo dovuto usare le riserve che vorremo ricostituire. Richiediamo un kit di valutazione di un componente con PLL per il segnale TCDS che ha caratteristiche spinte e possibilita’ di lock del segnale con fase costante. DAQ Attualmente il DAQ di TOTEM può essere utilizzato in modalità integrata con CMS o standalone. Il passaggio da un sistema all'altro avviene manualmente, collegando una fibra in un sistema o in un altro. Si richiede lo switch ottico per poter attuare la procedura di commutazione in remoto e senza effettuare connessioni manuali di fibre che le potrebbero danneggiare. F.S. Cafagna, CNS1 13th of September 2017

M&O Come d’abitudine, le cifre nel DB sono solo indicative, dato che quelle definitive saranno note a fine anno. In attesa della approvazione, da parte di RRB, del budget 2018 ed in attesa di definire lo share nella collaborazione per il 2018. Come per il passato, è facile prevedere una riduzione della quota INFN dei M&O A, in virtù della riduzione di FTE: a Pisa una «giovane», A Bari il gruppo del Politecnico ha ridotto ulteriormente il suo impegno l’impegno, dato che il sistema di clock è stato installato. M&O B per TOTEM rimangono costanti. Da notare che, per non gravare ulteriormente sulla spesa di MOF, i M&O B di PPS non sono stati inseriti perché proporremo alla collaborazione, come l'anno scorso, di considerarli «in-kind». F.S. Cafagna, CNS1 13th of September 2017

EYETS: T2 status F.S. Cafagna, CNS1 13th of September 2017

New T2 F.S. Cafagna, CNS1 13th of September 2017

New T2 Beam pipe change in LS2 Present T2 not compatible with the new beam pipe Need of a new detector after LS2 for the Luminosity Independent Cross Section measurement Studying a cheap detector based on scintillating counters and part of the old DAQ chain Easy mounting and removing (few hours) New space on the so called “Castor Table” Use it only in the cross section run and eventually in Ion runs and then remove it. F.S. Cafagna, CNS1 13th of September 2017

TOTEM strategy for 2018 Install USFD as timing detector in the vertical pot. Upgrade the diamond detector in the horizontal pot with double diamond topology. Data taking during special run b* 90m. R&D on new T2 for cross section measurement at 14TeV, after LS2. Continue CT-PPS program. Data analysis. F.S. Cafagna, CNS1 13th of September 2017

Backup F.S. Cafagna, CNS1 13th of September 2017

T2 & m run In 2015 T2 has been used as veto counter at trigger level to select exclusive events and reduce single diffractive pileup events. We are evaluating the impact of missing T2 and replacing its information with HF calorimeter. The first studies on an unbiased sample taken in 2015 show that HF has only 10% less rejection capability of T2. In 2018 the special run will be performed using the integrated CMS Daq, exploiting at maximum the CMS triggering capabilities. A more sophisticated HLT trigger algorithm is under study to enhance exclusive production and pileup rejection. Timing detectors information will be available at HLT together with CMS primary vertex reconstruction. F.S. Cafagna, CNS1 13th of September 2017

Summary of EYETS Remove all detector packages -> inspection at SX5 RP220-FAR removal, exchange ferrites, install RF shields and reinstallation Bake out of sectors 4/5 and 5/6 beam lines after reinstallation of pots Separate the secondary vacuum lines of the RP 210 & 220 to allow: Warm mode cooling in RP220 near and RP cylindrical (timing) Cold mode cooling RP220-FAR and RP210 (Pixel, Si-Strips) Installation of new LHC ion pumps Benchmarking of timing detector electronics - precision clock Diamond detector HV consolidation before re-installation One plane of diamond replace with UFSD. Installation of timing, Si-Strips and Si-Pixel detector packages Integration of Si-Pixel detector in readout Re-commissioning with DAQ F.S. Cafagna, CNS1 13th of September 2017

T1 ha preso dati dal 2011 a 7, 8 e 13 TeV nei runs a bassa luminosita’, come da design. “Missione compiuta”. T1 disinstallato a fine 2016 e tenuto pronto per la reinstallazione. Programma di LHC solo a alta luminosita’: T1 non reinstallato. T1 verra’ spostato in area di storage (probabilmente) in P5. Il programma a lungo termine di T1 e’ in fase di discussione con la collaborazione (impegno di Genova sino a LS2). 2015 Gen.16 2017 F.S. Cafagna, CNS1 13th of September 2017

Le richieste 2018 F.S. Cafagna, CNS1 13th of September 2017

La trasmissione I clock di riferimento…
… che vengono multiplexati, amplificati ed inoltrati in 4 canali … … modulano due portanti DWDM: l1, l2 … … multiplexata con le due con i clock … … una terza portante: lm, viene modulata da un network analyzer … F.S. Cafagna, CNS1 13th of September 2017

R&D on timing detectors
Double diamond Suitable technology for CT-PPS in 2018 Improved time resolution to 50ps per plane Radiation hardness Problems with crystals delivery from E6 UFSD New design from FBK for vertical pots Lab test will start in June and the Test beams in July. No radiation damage risk in special runs Time resolution ~30 ps for smaller pads ~80 ps for larger one. Larger detector surface and better acceptance Hybrid design already done All detector technologies will not affect the readout chain in the experiement, being equivalent at the hybrid output. F.S. Cafagna, CNS1 13th of September 2017

EYETS: T2 status Electronics and HV reported a working detector. Instead there is a severe radiation damage on the cooling and gas services: The plastic tubes around the detector are “cooked” by radiation and became fragile. One of the cooling pipes broke during last closure. Both gas and water pipes are made of the same material, although they are placed on the external side of the detector and far from the beam pipe, they suffered heavily during the last high luminosity campaign. Replacing all the pipes requires a very long work around the detector and the area is already quite hot. The ALARA principle exclude such operation during next EYETS F.S. Cafagna, CNS1 13th of September 2017

Il sistema completo F.S. Cafagna, CNS1 13th of September 2017

La trasmissione Modulator working points, must be kept in a linear range of the transfer curve ( quadrature point), controlling their bias voltage. This is done in our system using a specialized bias controller; bias voltage stability has been found dependent from the quality of the controller power supply. F.S. Cafagna, CNS1 13th of September 2017

DAQ Two clock paths are present at the moment: one for standalone acquistion (RunI), one from CMS TDCS We would like to buy a remote controlled optical switch, to be able to safely and efficently switch between the two system. F.S. Cafagna, CNS1 13th of September 2017

Diamond detectors integration
Diamond detector, designed for the vertical pot, has been modified to fit in the horizontal cylindrical pot. Diamond detectors have been installed during TS1 and TS2. Integrated with the TOTEM DAQ, since TS2. They can be readout standalone (special run), or in the CMS central DAQ. Thanks to: M. Berretti, E. Bossini, N. Minafra, M. Quinto F.S. Cafagna, CNS1 13th of September 2017

Timing detectors Diamond detectors, in operation in the horizontal pots, proven that their intrinsic radiation hardness is suitable to be used during high luminosity runs. Moreover R&D on double diamond, reaching an improved time resolution of 50ps, show that this solution is suitable to be used in CT-PPS and can be implemented in 2018. Diamond hybrid design, has been adapted to be used for USFD which are actually taking data in the horizontal pots. Using them in the vertical, during special runs, will significantly reduce the radiation damage risk. F.S. Cafagna, CNS1 13th of September 2017

Status of the TOTEM experiment at LHC.

Presentazioni simili

Presentazione sul tema: "Status of the TOTEM experiment at LHC."— Transcript della presentazione:

Presentazioni simili

Sul progetto

Feed-back

Entrare

Autorizzarsi attraverso i social network:

Status of the TOTEM experiment at LHC.

Presentazioni simili

Presentazione sul tema: "Status of the TOTEM experiment at LHC."— Transcript della presentazione:

Presentazioni simili

Sul progetto

Feed-back