# Presentation: 932853

## The D0 Magnets

**Shifter’s Tutorial**

## Where are the Magnets?

- Shifter's Tutorial

- April 14, 2003

## The D0 Magnets

**Muon Toroids**
**From Run I, modified**
**WAMUS Toroids: CF (|********|<1), EF(1<|********|<2.5) now electrically in series,  Operating current reduced from 2500 to 1500 A (B from 1.9 to 1.8 T) to reduce operating costs**
**SAMUS Toroids (2.5<|********|<3.6) removed**
**Elegant new control system**
**Large Iron Forward Shields inserted in SAMUS locations**
**Central Tracking Solenoid**
**New for Run II**
**Superconducting**
**2T**
** ****~1 X****0**
**Procured to Detailed Specification**

- Shifter's Tutorial

- April 14, 2003

## A Brand-new Control System for the Toroids

- Shifter's Tutorial

- April 14, 2003

## Toroid Fields?

- Shifter's Tutorial

- April 14, 2003

## Why Must I Degauss My Monitor Each time the Magnets are Charged?

- During Fieldmapping, in AH, no EF

- Shifter's Tutorial

- April 14, 2003

## D0 Solenoid

**What does it do?**
**Where is it?**
**When was it done?**
**How does it work?**
**Fieldmapping**
**Unfinished Business**

**The D0 Solenoid**

- Shifter's Tutorial

- April 14, 2003

## Castilla at LaThuile

****** ****p****T  ****> 1.5 GeV & **
**      ****J/******** ****p****T**** > 3.0 GeV **
**SMT hits>3 & CFT hits>4**

**J/********’s: 75,013**

- Shifter's Tutorial

- April 14, 2003

## More LaThuile

- Shifter's Tutorial

- April 14, 2003

## Yet More LaThuile

- Shifter's Tutorial

- April 14, 2003

## And Filthaut at Moriond

- Shifter's Tutorial

- April 14, 2003

## More Moriond

- Shifter's Tutorial

- April 14, 2003

## Highlighting the Solenoid

- Shifter's Tutorial

- April 14, 2003

## View During Run II Roll-in

- Shifter's Tutorial

- April 14, 2003

## Upgrade Wish List

**Requirements**
**Field:  **Good momentum and mass resolution with tracking:  sagitta ~ BL2
- 	B as high as prudent (Zeus = 1.8 T?)
-      Transparent
-      Must fit in r
-                                    =>**  2T**
** **
**Geometry: ****	****   **Must fit and be radially thin.
- 	2.8m  long;   55 < R < 70cm; “No” Fe return yoke
**Field Uniformity:**
**	**Graded winding; higher current density at the coil ends (ala Zeus, Aleph)
**Thin coil:**
**	**1 Xo of Al: Coil + bobbin, cryostat** **

- Shifter's Tutorial

- April 14, 2003

## What Is It?

-    **Two winding layers with 1.3 J at ends for improved field homogeneity:**

-    **Two Conductor Sizes for 1.0 J, 1.3 J:**

- r1

- r2

- 14.7 x 4.02

- 14.7 x 5.33

**What Is It?**

- Shifter's Tutorial

- April 14, 2003

## Technical Specifications

-  ~ 1.47

- Shifter's Tutorial

- April 14, 2003

## Technical Specifications

- Plus seismic loadings, iron decentering, FNAL ES&H, etc., etc.

- Shifter's Tutorial

- April 14, 2003

## Technical Specifications

- And I= 105% for 8 Hrs

- Shifter's Tutorial

- April 14, 2003

## When Was it  Done?

**When Was it  Done?**

-   D0/Fermilab Magnet Study Team Formed:                      10/3/92
-   PAC Approval of  D0 Upgrade  w/ Magnetic Tracking:   7/27/93
-   Fermilab Review of Magnet Conceptual Design:              8/11/93
-   Fermilab Magnet Procurement Readiness Review:         12/13/93
-   SEB Formation:                                                                 2/23/94
-   AIP Approved                                                                    5/13/94
-   Final Draft Magnet Technical Design Report:                  5/13/94
-   Director’s Review D0 Upgrade                                         5/27/94
-   SEB Report:                                                                     12/15/94
-   Subcontract Award to Toshiba                                           1/18/95
-   PDR 1  (at FNAL)                                                              3/15/95
-   PDR 2  (at FNAL)                                                              5/31/95
-   FDR 1  (at Keihin)                                                             7/22/95
-   FDR 2  (at Keihin)                                                             10/3/95
-   FDR 3  (at Keihin)                                                             3/19/96
-   FPR  1  (at Keihin)                                                             4/22/96
-   FPR  2  (at Keihin)                                                             7/23/96
-   FPR  3  (at Keihin)                                                           10/14/96
-   CD Test  (at Keihin)                                                           12/3/96
-   System Test (at Keihin)                                                      2/26/97
-   Magnet System arrives at Fermilab                                    5/12/97
-   Magnet  (+ Preshower Detector) Installed in Detector      6/16/98
-   Magnet at 2.0 T at FNAL                                                   9/11/98

- Shifter's Tutorial

- April 14, 2003

## Who Did It?

**Who Did It?**

-    **H. E. Fisk,  R. P. Smith,  R. Yamada (“ret”),  M. Mostafa , K. Krempetz,  R. Rucinski,  D. Markley,  R. Hance (ret),    W. Jaskierney, Del Miller and crew, R. L. Schmitt,  B. Squires,  R. Fast(ret)**
**    ****R. Kephart,   A. Tollestrup,  P. Martin,  P. Mantsch,  T. Nicol,  J. Strait,   R. Walker,  R. Huite**

**Fermilab:**

**Toshiba:**

-    **S. Mine,  T. Kobayashi,  K. Kimura,  W. Odashima,  H. Kozu, S. Ito**

- Shifter's Tutorial

- April 14, 2003

## QC Checking

- Shifter's Tutorial

- April 14, 2003

## Fieldmapping at Keihin

- Mapping at Batavia, 1998

- Mapping at Keihin, 1997

- Shifter's Tutorial

- April 14, 2003

## Delivery – Keihin to Batavia

- Shifter's Tutorial

- April 14, 2003

## Solenoid Arrival at Fermilab, May 12, 1997

- Shifter's Tutorial

- April 14, 2003

## Solenoid + “Obround” Chimney Segment

**Solenoid + “Obround” Chimney Segment**

**Ready for Installation of Preshower Detector**

- Shifter's Tutorial

- April 14, 2003

## Detail for Solenoid Cryo System

- Shifter's Tutorial

- April 14, 2003

## Cryo Energization Permit

- Energization System can charge Magnet iff Cryo Permit is Enabled, Accelerator Permit Enabled

- Shifter's Tutorial

- April 14, 2003

## Solenoid Energization System Control

- Fast ( ~ 11 sec) Emergency Discharge: Quench Detected
- Slow ( ~ 300 sec) Discharge: All Other

- Shifter's Tutorial

- April 14, 2003

## Solenoid Protection System

- Fast Dump

- Shifter's Tutorial

- April 14, 2003

##  D0 Solenoid Energization Control Console

- Shifter's Tutorial

- April 14, 2003

## Fast Discharge Test (Causes Quench)

- Shifter's Tutorial

- April 14, 2003

## Lower Field Joint Voltage Drops

- Shifter's Tutorial

- April 14, 2003

##  Solenoid in D0 Detector

- Shifter's Tutorial

- April 14, 2003

## Fieldmapper MK II

- MK I

- MK II

- Shifter's Tutorial

- April 14, 2003

##  Fieldmapper in Solenoid

- Shifter's Tutorial

- April 14, 2003

##  Fieldmapper Moving Arm with Hall Probes

- Shifter's Tutorial

- April 14, 2003

## NIKHEF Hall Probes

- “Outer” Probes

- Inner Probes

- Shifter's Tutorial

- April 14, 2003

## NIKHEF Inner Hall ProbesFNAL NMR Probes

- Shifter's Tutorial

- April 14, 2003

## Typical NIKHEF Inner Probe Locator Strip with 3 Probes

- Shifter's Tutorial

- April 14, 2003

## TOSCA 3D Model

- Shifter's Tutorial

- April 14, 2003

## TOSCA Predictions ?

**NMR (R = 53) = 20143 +/- 3**

**Hall Probes (same R) ~ 20130 +/- 10**

- Shifter's Tutorial

- April 14, 2003

## “Looks” OK

- Br(HallProbe) = Brcos()+Bzsin()

- Shifter's Tutorial

- April 14, 2003

## Not So Fast...

- Shifter's Tutorial

- April 14, 2003

## How Do Hall Probes Work?

- Shifter's Tutorial

- April 14, 2003

## HDHPW II

- Shifter's Tutorial

- April 14, 2003

## Br Fix at Hand

- Shifter's Tutorial

- April 14, 2003

## Some Fieldmapping Success

- Shifter's Tutorial

- April 14, 2003

## Run II Operation

- Shifter's Tutorial

- April 14, 2003

## D0 STAR

**4 g/s = 114 l/hr**

- Shifter's Tutorial

- April 14, 2003

## Operating Stability ?

- Shifter's Tutorial

- April 14, 2003

- Shifter's Tutorial

- April 14, 2003

## Factory Tests at Toshiba

**Factory Tests at Toshiba**

**Conductor temperatures **

**Support cylinder temperatures**

- S end

- N end

- Center

- S end

- Shifter's Tutorial

- April 14, 2003

## Cooldown 

**Cooldown from 300 K to 4.5 K**

**Cooldown detail below 80 K**

- Shifter's Tutorial

- April 14, 2003

## Cooldown 

**Cooldown from 300 K to 4.5 K**

- Shifter's Tutorial

- April 14, 2003

## Precision Load Line via NMR

- Shifter's Tutorial

- April 14, 2003

## First Fieldmapper Data at D0

- Shifter's Tutorial

- April 14, 2003