NICADD Participation in NICADD Participation in Fermilab Linear Collider ActivitiesFermilab Linear Collider Activities

• Linear Collider activities at NIU are rather diverse– Beam Physics & Diagnostics– Calorimeter & Muon Tracker– Financial Support of Fermilab Managed Activities– Outreach

• A number of individuals are involved– Faculty: 4 Detector; 1 Accelerator + 1 search

underway– Scientist: 5 Detector; 4 Accelerator– Students: 4 Detector; 4 Accelerator

• Current Funding– State of Illinois HECA Grant for ICAR– Dept. of Education Grant for NICADD 2001-2004 & 2003-2006– DOE: Advanced Detector Research (also pending)– NSF: UCLC (also pending)– Joint Technology Office: “Photoinjector Modeling and

Simulation”

Beam Physics and Astrophysics Beam Physics and Astrophysics GroupGroup

• Production of high-brightness electron beams at FNPL

• High Resolution electron beam diagnostics– Interferometry (transition

radiation)– Electro-optic sampling

(electromagnetic fields)• Theory and Simulation of space

charge– Chaos in time-dependent systems– Chaotic mixing in N-body systems

(beams, galaxies)– Validity of the continuum (Vlasov)

limit– Beam halo formation– New multiresolution algorithms

(e.g., application of wavelets).– Eight FY03 pubs…

Example: Chaotic Orbits in Thermal-Example: Chaotic Orbits in Thermal-Equilibrium BeamsEquilibrium Beams

[C.L. Bohn, I.V. Sideris, Phys. Rev. ST Accel. Beams 6, 034203 (2003)]

Snapshots of four differentclumps of chaotic orbits in a TE beam bunch with triaxial symmetry. Each clump grows exponentially to fill a volume commensurate to the totalparticle energy.Moral: Chaos can appear in simple static beams; thus one can expect (and one generally sees) chaos and fast collective dynamics in nonequilibrium beams!

Linear Collider Detector ActivitiesLinear Collider Detector Activities• Simulation, Design, and

Prototyping of a Scintillator Digital Hadron Calorimeter – Simulations indicate

approach competitive with analog calorimetry

– Prototypes indicate there is sufficient sensitivity (light x efficiency) & uniformity.

– Promising sensors– Now optimizing materials

& construction to minimize cost with required sensitivity

• Combined Hadron Tail – Catcher & Muon Tracker Test Beam Studies

• Simulation Infrastructure

Jet E(GeV)

/E Jet Resolution

Eflow = 0.17

Analog = 0.16

Jet E: Recon/Gen

DHC Prototypes: DHC Prototypes: Stack, Layer, & Unit CellStack, Layer, & Unit Cell

WLS to Clear Fiber MPTM

Si-PMs (PULSAR/MEPHI*) mounted on cell?Si-PMs (PULSAR/MEPHI*) mounted on cell?

Ru106, Si-PMT, 51 Volts, ~6 PE

0

100

200

300

400

500

600

700

800

900

1000

1 56 111 166 221 276 331 386 441 496 551 606 661 716 771 826 881 936A D C C HA N N EL

MEPHI sample, Courtesy of B.Dolgoshein

Representative Spectrum

*Moscow Engineering Physics Institute

NICADD/Fermilab ExtruderNICADD/Fermilab Extruder

Tail Catcher/Muon Tracker &Tail Catcher/Muon Tracker &Test BeamTest Beam

• Will enter into an MOU with DESY/ CALICE to– Contribute support and personnel to DHC test- beam– Provide Combination Tail Catcher / Muon Tracker

ECal

HCal

Tail-catcher

Scintillator Based Muon SystemScintillator Based Muon SystemSteel Cross-section

• Proposed ParametersProposed Parameters

- 16 x 5cm gaps 16 x 5cm gaps between between

- 10cm thick Fe plates.10cm thick Fe plates.

-Module sizes: Module sizes:

- 940cm(Length)940cm(Length)

- (174 to 252cm)(Width)(174 to 252cm)(Width)

- Scintillator StripsScintillator Strips

- 4.1 cm X 1 cm4.1 cm X 1 cm

-8u & 8v planes8u & 8v planes.

Fe Thickness = 10 cm

Gap = 5 cm

R(inner) = 4.45m stave 0

stave 1

Simulation InfrastructureSimulation Infrastructure• Supporting Linear Collider Effort Through

– Simulation of DHC, Test Beam, Tail Catcher– LC wide code development– Simulation requests

• Technically speaking:– Development and bug-fixing on LCDG4.

• Non-projective geometry simulations in HCal using LCDG4-NP, based on the REL01 LCDG4 codebase.

• SIO file format fixes. – Mutual certification of LCDG4 and Mokka Geant4

simulators. – Authoring of AIDA codes for analysis of text, SIO and LCIO

output. – Production of SIO datasets of SD geometries for

researchers at Argonne and SLAC. – Purchase and deployment of new LCD Computing server

k2. – Setting up of physics distribution for shared development

environment.

Other Linear Collider Related Other Linear Collider Related ActivitiesActivities

• Assisted with purchase of large and small furnaces for LC structure annealing.

• Assisting with the formation of an Advisory Committee to help Fermilab work with local organizations and citizens.

• Funding hydrogeological and geological studies for LC sites at NIU Geology Dept.

• Outreach program for local schools and civic organizations.