The Superconducting Solenoid - Some old news

Sep 10, 1999

SOLENOID RUN PLAN - JULY/AUG/SEPT 1999

Major Tasks: Controlled Access to the assembly pit

Schedule:
Dates
 Activities
July 27-30
 Fieldmapper cabling/software tune-up
Solenoid Energization System Readiness
ICD Prep.
Establish CF Operational Readiness
Install Fieldmapper Angular Control Arm
Aug 02-06
 Refrigerator/Magnet Cooldown to 90K (depending on site power)
Fill LHe Dewar
Complete Hazards Analysis for Magnet(s) Operation
Magnet Cooldown to 4K
ICD Check
Chimney Bus Lower Joint Tests
Preliminary low-current Fieldmapping tests
Aug 09-13
 Close CF iron
Final mounting of the Mapper
Aug 16-20
 Start fieldmapping on Second Shift (4pm-12pm)
Miscellaneous Parasitic Refrigerator Measurements
Aug 23-27
 Fieldmapping on Second Shift (4pm-12pm)
VLPC Transfer-line Test
Aug 23-27
 Correct misalignments and/or hall effects
Start production fieldmapping
Aug 30-Sept 3
 Production Fieldmapping
Sep 7-Sept 10
 Production Fieldmapping
Sep 13-Sept 17
 Production Fieldmapping
Sep 20-Sept 25
 Fieldmapper Geometrical Survey

August 99 FieldMapping Data ON LINE

Sep 11, 1998

The D0 solenoid reached 2.0 T this afternoon without upset or complication. The cryogenic and power/control systems performed flawlessly, and preliminary fieldmapping was begun.

When we finish fieldmapping it will be ready for the installation of the upgrade tracking systems and Run II physics!

First axial field-mapping sweep at 2 Tesla:

Axial Sweep

Commissioning Activities

April 20, 1998

We are modifing the light weight field measurement device. Its mechanical structure is shown schematically in the figure here (drawn by Pat Poll).

An axial tube beam with a carriage is supported at both ends of the solenoid, and the Hall probe sensors are attached to the arm mounted on the carriage. The rotational motion of the beam and the axial motion of the carriage are controlled by two stepping motors through the extension pipe. The parts of the device which go into the solenoidal field volume are made of completely non-magnetic components, to prevent any eddy current effect in the event of a quench.

After the experience at Toshiba, we designed a new cable handler for both movements, rotational and axial. This system is being mounted. After the study of the mechanical systematics (a D0 note is in preparation), the carriage, the arm and the probe holder are under revision.

We are also carring out some studies to reduce the errors due to the use of the hall probes to measure the field inside the solenoid (another note?).


This page was created on Apr 20, 1998.
Last Modified: Jul 30, 1999
 Send any questions, suggestions or comments
about this page to Miguel Mostafá.