CMS 101: Overview - Department of Physics and Astronomy•CMS is 14.6 m tall, ATLAS is 20 m tall....

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1 CMS 101: Overview Sarah Eno ( thanks to people I stole slides from: Dan Green, P. Foka, Y. Schutz, R. Forty, F. Ferro, M. Szcaekowski, Harvey Newman, public CERN web pages

Transcript of CMS 101: Overview - Department of Physics and Astronomy•CMS is 14.6 m tall, ATLAS is 20 m tall....

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CMS 101: Overview

Sarah Eno

( thanks to people I stole slides from: Dan Green, P. Foka, Y. Schutz, R. Forty, F. Ferro, M. Szcaekowski, Harvey Newman, public CERN web pages

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Purpose/Overview of CourseGeneral Introduction: Sarah Eno (30’)

Introduction to the Detector: Jim Freeman (30’)

Introduction to the Trigger: Greg Landsberg (15’)

Introduction to the Software: Eric James (30’)

Introduction to the FNAL UAF: Hans Wenzel (10’)

The LPC: Sarah Eno (20’)

• Learn enough CMS jargon to understand many CMS week talks

• Learn who’s who in CMS

• have somebody (us) to contact with stupid questions about CMS

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Outline• Some basics on the LHC accelerator/detectors/ physics at 14 TeV

• International CMS

• Life at CERN

• US CMS

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The Accelerator

CERN

Geneva airport

ATLAS

CMS ALICE

LHCb

Mont Blanc

LHC tunnel

In the LEP tunnel

pp √s =14 TeV L=1034 cm-2 s-1=10 mb-1MHzcrossing rate 40 MHzHeavy ions (1 month/year)

http://lhc-new-homepage.web.cern.ch/lhc-new-homepage/

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Physics Cross

Sections

High Center of Mass energy and instantaneous luminosity means exciting physics reach

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Rate/ Interactions per crossing

1

1

10 ( )1 10 ( )

.795 40 MHz

R mb MHz mb

N mb MHz mb

σ

σ

−

−

= •

< >= • ••

3.5 interactions/crossing at 2E33 (2 mb-1 MHz, σ=55 mb)

17.3 interactions/crossing at 1E34 (10 mb-1 MHz, σ=55 mb)

W->eν cross section about 10 nb -> Rate of 100 Hz at 1E34

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Comparison to Tevatron

34 2 1

33 2 1

beams: pp

14 GeVcrossing time: 25 nsinteraction region sigma is 5 cmDesign Luminosity: 10

17Starting Lum: 2 10

3.5

LHC

s

cm sn

cm sn

− −

− −

=

< >=×

< >=

32 -2 1

Tevatronbeams: pp

s 1.96 TeVcrossing time = 396 nsinteraction region sigma is about 28 cmluminosity = 0.5-1 10 cm

1.25 2.5s

n

−

=

< >= −

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<n> Khoze, Martin, Ryskin hep-ph/0007359

Range comes mostly from the difference between the CDF and E710 cross sections at 1.8 TeV.

total cross section

Fraction elastic, diffractive

Total cross section 70 mb at Tevatron (inelastic is 46), 100 mb at LHC (50-60).

<n>=3.5 low lum, 17 high lum

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dN/dη

Chris Seez

At the tevatron dN/dη is 4. Great deal of uncertainty on this number for the LHC

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Short Crossing Time

(signal shape in ecal)

time-of-flight to:

η=0 η=2.4

ECAL: 4 ns 10 ns

HCAL: 6 ns 13 ns

Coil: 10 ns -

Muon 1: 13 ns 25 ns

Muon 4: 24 ns 36 ns

ECAL (100 ns bins)

HCAL (25 ns bins)

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Schedule

First Beams: “Summer” 2007Then Physics

Schedule Consolidated. CMS Ready to Close June 15, 2007

T-2 and counting

LEP tunnel was designed with the idea of running protons, but the “date” for this running was first proposed around 1991.

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Status of Accelerator Construction

http://lhc-new-homepage.web.cern.ch/lhc-new-homepage/DashBoard/index.asp

Easy to see if the accelerator is falling behind. So far, despite some problems with the cryo system that feeds liquid He to the magnets, it is not.

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Questions?What were you dying to know about the accel that I didn’t answer?

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Detectors

If you don’t know which detector this is, then I’m glad you are here!

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CMS

More in Jim’s talk

CMS public web page: http://cmsdoc.cern.ch

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Other LHC Experiments: ATLAS

•CMS is 14.6 m tall, ATLAS is 20 m tall.

•CMS has its solenoid outside its ECAL, ATLAS has ECAL outside the solenoid

•Tracking: CMS has 4T over 1.3 m radius, ATLAS has 2 Tesla over 1.2 m radius.

• CMS has 2602 members, ATLAS 3598

• US is 20% of CMS, 13% of ATLAS

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Other LHC experiments: LHCb

Turns on at the same time as ATLAS and CMSLooks like a fixed target experiment: covers 1.9<η<5.3

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Other LHC experiments: Alice

Heavy ions (CMS will also do heavy ions)

central barrel di-muon spectrometer

pp and pp and pApAfor comparison with PbPb

for their own merit

global pp properties

jet physics

diffractive physics

Starts up at same time as ATLAS, CMS, running pp. Nominal first run for heavy ions: 2008

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Alice

0 1 2 3 4 5 p (GeV/c)

1 10 100 p (GeV/c)

TRD e /πPHOS γ /π0

TPC + ITS(dE/dx)

π/K

π/K

π/K

K/p

K/p

K/p

e /π

e /π

HMPID (RICH)

TOF

MUON SPECTROMETER

Tracking with low PT cutoff and Particle ID

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TOTEMReally part of CMSElastic scattering experiment.

~10 m

~14 m

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QuestionsWhat were you dying to know about the other detectors that I didn’t answer?

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Getting Involved

What you need to know to get involved?

• get your “group leader” (one per institution) to get you registered with the cms secretariat

• get a CERN mail/computer account so you can join international cms listservs

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Where is CMS?Need to cross the border to get from the cafeteria/building 40 to CMS. Carry your passport!

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The Lab: Useful things

Building40

The “nice” hostel

cafeteria

The Bermuda triangle of CERN

Building 32

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Building 40

Office space in building 40? Good luck!!!

Main building for CMS/ATLAS offices

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Building 32

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International CMS

Who are these two men?

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CMS: the countries

Ordered by size: USA (525 collaborators), Italy (398), Russia (326), CERN (204), France (146), UK (117), Germany (116)

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Countries by Detector

ECAL: UK, France, USA, …

HCAL: USA, Russia, …

Muon: Italy, USA, …

Track: Italy, USA, …

DAQ: Italy, USA

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International CMS Organizational Structure

• collaboration board

• management board

• finance board

• technical coordination group

Rather complex…

http://cmsdoc.cern.ch/docofficial.shtmlhttp://cmsdoc.cern.ch/CMSstructures/organization.html

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Management Structure

MB

US is Well-Represented, with Appropriate Level of Leadership

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Others

•Finance board

•Technical Coordination Group

•Committee for Nomination of Speakers

•Editorial Board

•Annual Review Committee

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Typical Meeting Schedule

CMS and CPT weeks are of general interest. Each detector system also has “weeks”.

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International CMS web page

http://cmsdoc.cern.ch/cms.html

Ugly, but if you poke around long enough, you’ll find what you need.

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International CMS Agenda Server

Quite useful. Find talks from most meetings.

http://agenda.cern.ch/displayLevel.php?fid=2l76

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VRVS

• go to radio shack and buy a headset. If you feel rich, buy a video camera. Don’t use a table mike, etc unless you get expensive hardware. Instead, use a cheap headset.

• go to www.vrvs.org and download the software (enable pop ups and java)

• MUTE WHEN YOU ARE NOT TALKING!!!

CMS uses VRVS for video conferencing. Get over it!

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Getting onto International CMS mailing lists

First, you need a CERN mail account and password.

Then go to http://wwwlistbox.cern.ch/And log onto SIMBA using this account/pass

You might try searching on lists containing “cms”

Warning: there are also USCMS mailing lists that are not in this system!

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Life at CERN

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CMS Secretariathttp://cmsdoc.cern.ch/peoplesecr.shtml

Paper supplies, pens, cute folding cubes of CMS pictures, cute calenders with CMS pictures, etc.

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Tina Vernon

Can help with various things. Rentals, room reservations when building 40 is full, hostel reservations, all kinds of useful things…

http://uscms.web.cern.ch/uscms/

Many useful hints on life at [email protected]

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Salavat Abdullin

Official contact person at CERN for the LPC.

He’s your man on the ground, when only that kind of help will do!

[email protected] (russian names tend to have english and french spellings)

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Coffee and pastries

Building 40

cafeteria

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the Cafeteria Patio

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Arriving at CERN

• Swiss and French electricity adaptors have slightly different sizes. Both have 2 round prongs.

• rental cars usually have manual transmissions

If you are staying at the hostel and arrive on the weekend, the guards will have the key. Ask the drive to go to the CERN gate with the flags.

Very hard to get “hostel” room in summer. Registration begins April 1. Sometimes (especially for FNAL employees) Tami Kramer and Terry Read can get you rooms, as they get priority to reserve, and reserve a block.

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CERN Users Office

ID needed to get into CERN after hours

It has to be renewed every two years, which is a bummer.

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AcronymsCPT: computing, physics, trigger

PRS: physics, reconstruction, selection

MB: management board

CCS: computing, core software, production

TriDAS: Trigger and data acquisition system

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CPTCPT: Computing, Physics, and Trigger (Paris)PRS:Physics, Reconstruction, and Selection

Detector (Paris, Darin)Analysis (Paris, Albert)

Where the analysis action is at.

http://cmsdoc.cern.ch/cms/PRS/www/prs.php

Paris Sphicas Albert De Roeck Darin Acosta

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CPT

EvF/DQME. Meschi

ReconstructionT. Boccali

Analysis ToolsL. Lista

SimulationM. Stavrianakou

Calibr/alignmentO. Buchmuller

L. Lueking

FrameworkL. Sexton

SoftwareL.Silvestris

A.Yagil

Integration Program

S. Belforte/I. Fisk

Facilities and Infrastructure

N. Sinanis

Operations ProgramL. Barone

Technical Program

P.Elmer/S.Lacaprara

ComputingL. BauerdickD.Stickland

Project ManagerP.Sphicas

Project OfficeV.Innocente

L.Taylor

Fast SimulationP. Janot

ECAL/e-γC. SeezY. Sirois

TRACKER/b-τI.TomalinF. Palla

HCAL/JetMETJ.RohlfC.Tully

MuonsN. NeumeisterU.Gasparini

Detector-PRSD.AcostaP.Sphicas

OnlineSelectionS. Dasu

C. Leonidopoulos

HiggsS. Nikitenko

SUSY & BSML. Pape

M. Spiropulu

Standard ModelJ. Mnich

Heavy IonsB. Wyslouch

Analysis-PRSA.DeRoeckP.Sphicas

Generator ToolsF. Moortgat

S. Slabospitsky

ORCA for PTDRS. Wynhoff

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PRS Meeting Schedule

Alternate Tuesdays 16:00 (cern time of course)

muon, tracking

Alternate Wednesdays 16:00

e/gamma, jet/met

Alternate Thursdays 16:00

Online Selection

Most of the physics groups only meet during CPT weeksEasy to attend via VRVS

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Higgs Reach/Time Scales

1 year, 1/10th

design lum

1 year, design lum

1 month, 1/10th

design lum

If we can start up at 1/10th design luminosity, we’ll discover a Higgs with mass greater than 130 GeV within 1 year. Will cover entire theoretically allowed range with 1 year of design luminosity.

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SUSY reach/ TimeScales

Cosmologically plausible region of parameter space covered within 1 year 1/10th design luminosity. 1 year of design luminosity covers all regions interesting for EWK symmetry breaking

M a s s ( G e V ) σ ( p b ) E v t s / m o n t h L o w l u m -h i g h l u m

5 0 0 1 0 0 1 0 5 - 1 0 6 1 0 0 0 1 1 0 3 - 1 0 4 2 0 0 0 0 . 0

1 1 0 1 - 1 0 2

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Questions

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US CMS

Fermilab

Northeastern

Boston MIT

FairfieldRutgersPrinceton

Rochester

Carnegie Mellon

Virginia Tech

Maryland

Johns Hopkins

Florida

Florida State

Alabama

Mississippi

Rice

UT DallasTexas Tech

Ohio State

Notre Dame

Purdue

Minnesota

IowaIowa State

Nebraska

Wisconsin

NorthwesternIllinois, Chicago

UC Davis

UC San Diego

UCLAUC Riverside

Cal Tech

Lawrence Livermore

KansasKansas Stat e

UC Sant a Barbara

November 10, 2000

By size (physicists)

FNAL: 58

Florida: 21

UCLA: 15

Davis: 13

MIT: 13

Rochester: 13

Rutgers: 11

Growing quickly!

44 Institutions (+3)

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US CMS: non-elected bureaucrats

Research Program Manager: Dan Green, Deputy: Bob Cousins

Level 2 managers:

pixels: Bruno Gobbi (Northwestern). tracking: Joe Incandela(UCSB) Endcap Muons: Dick Loveless (Wisconsin), GiogioApollinari (FNAL) DAQ: Vivian O’Dell (FNAL) ECAL: Roger Rusack (Minnesota) HCAL: Andris Skuja (MD) Trigger: Wesley Smith (Wisconsin)

Software Management: Lothar Bauerdick(level 2 Bob Clare, UCR and Ian Fisk, FNAL)

CMS Maintenance and Operations: Jim Freeman (FNAL)

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US CMS: Elected Bureaucrats

http://uscms.fnal.gov/uscms/organization/organization.html

•US CMS Collaboration Board: chair: Harvey Newman (cal tech), deputy chair: Vasken Hagopian (FSU) members: 1 rep per institution.

•US CMS Advisory Board: chair and deputy the same, + 1 elected rep per system + US physics coordinator + outreach coordinator + software/computing manager + construction project manager

•US CMS Advisory software and computing Board (6 elected positions)

• US CMS election committee (2 elected positions)

• US physics coordinator (1 elected position) Sarah Eno (MD)

• various subsystem institutional boards (1 rep per institution)

Very elaborate elected structure

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US CMS Meetings

1 per year in late spring, place rotates. Good place to network.

Make sure you are on the us cms mailing list by sending a mail to [email protected]. Leave the subject line blank. In the body, put “subscribe uscms-all [email protected] Sarah Eno” except don’t put the quotes and substitute your information for mine. (there are many email lists for uscms on this listserv. Go to http://computing.fnal.gov/email/listserv/ to find out how to find out all the names. Look for names startingUSCMS-XXX)

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Life in the US

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US CMS Web pagehttp://www.uscms.org/

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Getting an account at FNAL

http://www.uscms.org/scpages/general/uaf/accounts.html

Learn more in Hans’ talk

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The LPC

General Introduction: Sarah Eno (30’)

Introduction to the Detector: Jim Freeman (30’)

Introduction to the Trigger Table: Pam Chumney (20’)

Introduction to the Software: Yuri Gershtein (30’)

Introduction to the FNAL UAF: Hans Wenzel (10’)

The LPC: Sarah Eno (15’)


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