# Presentation: 438968

## C0 Interaction Region (WBS 2.0) 

- _Mike Church (WBS 2.0)_

## Overview

- Introduction
- Technical components
- Cost and Schedule
- Project flow, critical path, and risk analysis
- Breakout talks
- Glossary of terms

## Requirements

- Provide an interaction region at C0 with * < 50 cm
- Support luminosity of >1E32 cm-2sec-1
- Keep magnetic components clear of C0 Collision Hall
- Maintain capability of running CDF and D0 experiments
- Complete installation in the 2009 shutdown
- Reuse as much Tevatron infrastructure as possible

## Tevatron C0 Region

**Collision Hall**

**Tevatron beamline:  B43 to C17**
**(445 m, 7% of Tevatron Ring)**
**+ B4, C0, C1 service building installations**
**+ remove 4 magnets @A4/B1**
**+ modify a few corrector circuits**
**- C0 collision hall (after 2005)**

**B4**

**C0**

**C1**

## New LHC-type quadrupole magnets (10 installed)
New spools (10 installed)
“spool” == corrector magnets, power leads, safety leads, .....
Electrostatic separators (6 installed)
Power supplies
Nonmagnetic cryogenic elements
cryogenic bypasses, cryogenic spacers, “turnaround” cans, ....
Infrastructure modifications
cryogenic headers, shielding, controls, software, operations, ....

Installation in 2005, 2007, 2008, 2009 shutdowns

- New spools (10 installed)
- “spool” == corrector magnets, power leads, safety leads, .....
- Electrostatic separators (6 installed)
- Power supplies
- Nonmagnetic cryogenic elements
- cryogenic bypasses, cryogenic spacers, “turnaround” cans, ....
- Infrastructure modifications
- cryogenic headers, shielding, controls, software, operations, ....
- Installation in 2005, 2007, 2008, 2009 shutdowns

**C0 IR Major Technical Components**

## Organization                                          

**WBS 2.0**
**M. Church**

**WBS 2.1**
**magnets**
**D. Chichili**

**WBS 2.2**
**2005 shutdown**
**P. Garbincius**

**WBS 2.3**
**power supplies**
**G. Krafczyk**

**WBS 2.4**
**cryogenics**
**J. Theilacker**

**WBS 2.5**
**controls**
**S. Lackey**

**WBS 2.6**
**instrumentation**
**R. Thurman-Keup**

**WBS 2.7**
**separators**
**R. Bossert**

**WBS 2.8**
**2008 shutdown**
**R Reilly**

**WBS 2.9**
**2006 shutdown**
**R. Reilly**

**WBS 2.10**
**2007 shutdown**
**R. Reilly**

**WBS 2.11**
**2009 shutdown**
**R. Reilly**

**WBS 2.12**
**hardware**
**commissioning**
**G. Annala**

**WBS 2.13**
**management +**
**acc. physics**
**M. Church**
**P. Garbincius**
**J Johnstone**

**Base cost: $28.1M   (Material: $15.5M, Labor: $12.6M)**

**WBS 2.1.1**
**low beta **
**quadrupoles**

**WBS 2.1.2**
**new spools**

**WBS 2.1.3**
**magnet**
**management**

## Lattice

**Features:**
******35 cm ***********
** ****Insertion adds 1 unit tune in each plane**
** ****Insertion is optically matched to the rest of Tevatron at all stages of operation**
** ****Magnetic elements stay outside C0 collision hall**
** ****Two modes of operation:**
******collisions @ C0  ****or**
** ****collisions @ B0 and D0**

**The lattice design is mature, and any future modifications are on the level of fine tuning.**

**C0 collision lattice**

## Beam Halo

**Beam halo calculations have been completed.  Background rates are reduced a factor of ~10 with shielding and new collimator.**

- beam loss rates (104/sec) u.s. and d.s. of IP’s

- 105 particles/sec entering collision hall (R<3.5m)

## Tune Footprints

- Antiproton bunch #6 tune footprint with 270E9 protons.

## Low Beta Quads

**Features:**
-  Modified LHC design – cold mass is nearly identical; cryostat is redesigned to fit into the Tevatron tunnel
-  Length varies from 1.4m to 4.4m
-  Required current is 9560A
-  10 magnets to be installed:  2 x (Q1-Q5)

## Spools

- Corrector

- BPM

- HTS Leads

- Vacuum break

- Liquid Nitrogen volume

- Vacuum vessel

- 2-phase heat exchanger

- Helium vessel

-  10 spools to be installed (3 types)
-  Corrector packages contain V dipole, H dipole, quad, skew quad, or sextupole coils
-  10KA HTS leads provide power to adjacent quadrupoles

**X2 spool**

## HTS Leads

- American Superconductor Co

-  6KA lead pairs have been used in the Tevatron for ~3 years
-  We have successfully tested these lead pairs to 10KA under pressure and temperature conditions similar to Tevatron operations
-  Baseline proposal is to use 7 of these  lead pairs already in hand and purchase 6 more with identical external dimensions
-  (at CD-1, proposal was to use 2 6KA HTS lead pairs per spool)

**HTS == High Temperature Superconductor**

## Corrector Magnets

** ****Baseline proposal is to use a BNL design**

## Nonmagnetic Cryogenic Elements

- 9 new nonmagnetic cryogenic elements will be installed for the C0 IR project:  bypasses, spacers, “turnaround” cans
- These elements house cryogenic piping for helium and nitrogen, and carry superconducting cable for the main Tevatron bus.
- Modifications to the Tevatron helium and nitrogen headers will also be made in order to make room for  the new magnets.

## Electrostatic Separators

- 6 electrostatic separators will be installed for the C0 IR project.
- These separate the proton and antiproton beams onto helical orbits.
- These are identical in design to the separators currently in use in the Tevatron.  Currently new separators are being fabricated and tested as part of the Run II upgrades.
- Power supplies and polarity switches will also be built as part of this project.

## Power Supplies

**In addition to separator power supplies, the following power supplies are required:**
-  3 10KA supplies for LHC-type quadrupoles
-  Similar to successful MI design, but with lower voltage
-  4 5KA supplies for reused Tevatron Q1 quads
-  Similar to successful MI design, but with lower voltage
-  2 200A shunts for LHC-type Q1/3 quadrupoles
-  Based on recent design for MI dipoles installed @ C0
-  26 100A supplies for the corrector magnets
-  Similar to MI design, but with additional quench detection circuitry

## 2005 Shutdown

- The C0 straight section must be reconfigured to allow staged installation of the BTeV detector.
- Currently the Tevatron uses MI dipoles to complete the bend at C0.  These extend into the C0 collision hall.
- These will be removed and full length Tevatron dipoles will replace the half-length dipoles currently in B4 and C1.

**MI Dipoles**

## 2006 – 2009 Shutdowns

-  2006 shutdown
-  no work currently planned
-  2007 shutdown (2 months)
-  LCW (Low Conductivity Water) and buswork installation
-  2008 shutdown (2 months)
-  LCW and buswork installation continued
-  Removal of Q1s and P-spools from A4 and B1
-  Modification of cryo headers at B4 and C1
-  2009 shutdown (4 months)
-  Full installation of C0 IR components
-  Almost all devices between B43 and C17 get moved or replaced
-  Move 23 dipoles, install 28 quads/spools, 7 cryogenic devices, 6 separators, 2 shield walls, 2 collimators

## Construction Cost              

## M&S Obligation Profile by Fiscal Year    

## Labor Profile by Fiscal Year      

## Project Flow    

**Corrector**
**Fabrication**

**  ****Corrector**
**Design**

** **

**  **

**Outside Vendor**

**Design**

**Fabricated @Fermilab**

**SC Cable &**
**Steel**
**Fabrication**

**Spool**
**Assembly**

**HTS Lead**
**Fabrication**

**Cold mass**
**Production**

**Quadrupole**
**Assembly**

**Spool**
**Design**

**Cryostat**
**Design**

**Quadrupole**
**Cold Test**

**Spool**
**Cold Test**

**Test Stand**
**Fabrication**

**Power Supply**
**Design**

**Cryogenic**
**Design**

**Power Supply**
**Fabrication**

**Power Supply**
**Assembly &**
**Installation**

**Cryogenic**
**Fabrication**

**Separator**
**Fabrication**

**Controls &**
**Instrumentation**

**2005**
**Shutdown**

**2007**
**Shutdown**

**2008**
**Shutdown**

**2009 Installation of C0 IR Components**

**SynchLite**
**Design**

**Regulator**
**Fabrication**

**Critical Path is in red**

**235d total float ******

**297d total float ******

## Key Milestones with Distributed Float

- Initiate procurement of corrector magnets (4/05)
- Initiate procurement of superconducting wire (5/05)
- Initiate procurement of HTS leads (3/06)
- Begin quadrupole production (11/06)
- Begin spool assembly (3/07)
- Complete quadrupole fabrication and test (10/08)
- Complete spool fabrication and test (4/09)
- (RED items are on critical path)

## Critical Path Without Distributed Float

**  ****Spool assembly:**
**  ****design ******** contractual process ******** assembly ******** cold-testing**
**  ****Fabrication estimates based on LHC DFBX experience**
**  ****DFBX is LHC cryogenic feedbox of similar complexity**

## Risk Analysis

_**Risk**_
- Delay in superconducting cable procurement
- Delay in corrector magnet contract

_**Mitigation**_
- A Request for Proposals “RFP will be prepared for release in 10/04 so that we will be able to issue a PO by 1/05
- An Memorandum of Understanding (MOU) is being written with BNL so that we will be ready to commit funds by 1/05

- 
- 

##    Responses to CD-1 Review Recommendations

##    Responses to CD-1 Review Recommendations (2)

##    Talks Prepared for Breakout Session

- _More detailed information is available in the breakout sessions_.
- Accelerator Physics – John Johnstone
- Quadrupole Cold Mass – Fred Nobrega
- Quadrupole Cryostat – Tom Nicol
- Spools – Tom Page
- HTS Leads – Sandor Feher
- Corrector Magnets – Mike Anerella (BNL)
- Magnet Cost Overview – Deepak Chichili
- 2005 Shutdown – Peter Garbincius
- Power Supplies – George Krafczyk
- Electrostatic Separators – Rodger Bossert
- Cryogenic Elements – Jay Theilacker
- Controls – Sharon Lackey
- 2007 – 2009 Shutdowns – Rob Reilly

##    Glossary

***********:****  **beta function at the interaction region; luminosity is inversely proportional to this quantity
**Spool:****  **cryogenic element that contains corrector magnets, power leads, safety leads, quench stoppers, relief valves, and other items not contained in main magnets
**HTS lead:****  **High Temperature Superconductor power lead; transfers magnet power from external warm bus to superconducting cable within cryostat
**RFP:****  **Request for Proposal;  this initiates the formal procurement process
**DFBX:****  **LHC cryogenic feedbox; used as basis of estimates for spool assembly
**LCW:  **Low Conductivy Water; used to cool magnets, power supplies, and power leads
**Tevatron locations:  **Tevatron is divided into 6 major sectors, A – F; each sector has a long warm straight section, A0 – F0;  each sector is divided into 4 cryogenic houses, A1 – A4, ..., F1 – F4

## Project Flow with Distributed Float    

**Corrector**
**Fabrication**

**  ****Corrector**
**Design**

** **

**  **

**Outside Vendor**

**Design**

**Fabricated @Fermilab**

**SC Cable &**
**Steel**
**Fabrication**

**Spool**
**Assembly**

**HTS Lead**
**Fabrication**

**Cold mass**
**Production**

**Quadrupole**
**Assembly**

**Spool**
**Design**

**Cryostat**
**Design**

**Quadrupole**
**Cold Test**

**Spool**
**Cold Test**

**Test Stand**
**Fabrication**

**Power Supply**
**Design**

**Cryogenic**
**Design**

**Power Supply**
**Fabrication**

**Power Supply**
**Assembly &**
**Installation**

**Cryogenic**
**Fabrication**

**Separator**
**Fabrication**

**Controls &**
**Instrumentation**

**2005**
**Shutdown**

**2007**
**Shutdown**

**2008**
**Shutdown**

**2009 Installation of C0 IR Components**

**SynchLite**
**Design**

**Regulator**
**Fabrication**

**Critical Path is in red**

**235d-****40d****-****80d****-****f(120d) ****=104d end float ******

**297d-****62d****=235d end float ******

**+40d**

**+62d**

**+60d**

**+80d**

**+80d**

**+80d**

**+120d**

**+60d**

**+60d**

**+40d**

**+40d**

**+120d**

**+40d**

**+40d**

**+60d**

**+60d**

**+120d**

**+120d**

**+40d**

**+120d**

**+20d**

**+80d**