CLAS12 R1 Progress Reports

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Revision as of 22:26, 29 September 2011 by Llim (talk | contribs) (→‎9/29/11)
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The Drift Chamber Wiki at JLab

Clean room Prep

CleanRoomPrep2009-2011

Clean room Construction 2011

CleanRoomConstruction2011

Jlab Shipment 8/8/2011

JLabShipment08082011

Jlab Stringing Prep

Install fixtures

8/9/11

Installed the crane

1CLAS12DC Crane 08092011.jpg2CLAS12DC Crane 08092011.jpg


Brought down the platforms

1CLAS12DC Platform 08092011.jpg2CLAS12DC Platform 08092011.jpg


Bring down the scissor lifts

2CLAS12DC scissorLift 08092011.jpg

8/17/11

Install A-Frame for mounting DCs

1CLAS12DC Aframe1 08092011.jpg2CLAS12DC Aframe1 08092011.jpg

Mounting Sector 1 DC

1CLAS12DC MountDCS1 08092011.jpg2CLAS12DC MountDCS1 08092011.jpg3CLAS12DC MountDCS1 08092011.jpg4CLAS12DC MountDCS1 08092011.jpg

Changing Room

8/23/11

Finished installing the changing room. The changing room is used to put on clean room apparel prior to entering the clean room. A HEPA filter is placed on top of the room and set to high in order to blow particles off a person before they enter the clean room.

2CLAS12DC ChanginRoom 08232011.jpg

We still need to install a hard door between the changing room and the clean room.

Clean Room 8/23/11

1CLAS12DC CleanRoom 08232011.jpg2CLAS12DC CleanRoom 08232011.jpg


9/22/11

The doors into the clean room have been sealed by temporary walls for the renovation project which will start in the room next door. Below is a picture of the wall which has sheet rock on top of a plastic cover surrounding metal studs. The wall has been calked on the outside to prevent dust from coming through.


09222011 CLAS12DC CleanRoom.jpg

Also note that the HVAC temperature setpoint was changed to 68° F around noon.

9/23/11

2 - 480 V outlets have been installed.

Cleanroom fans were turned on this afternoon around 2:30 PM.

9/25/11

The chamber was wiped down and vacuumed.

All of the pre-tensioners have been set to a spring height of 1.75".

Stringing Begins 9/26/11

092511 1CLAS12R1StringingBegins.jpg

Temperature fluctuations were within ± 2° during the stringing

092511 1CLAS12R1StringingTemp.png

HVAC temperature setting was dropped to 67° from 68° and the Δt was changed from ±2° to ±4° at around 1 PM.

Due to the late start this afternoon, we were only able to string 3 guard wires.

9/27/11

092711 1CLAS12R1StringingBegins.jpg092711 2CLAS12R1StringingBegins.jpg092711 3CLAS12R1StringingBegins.jpg

Temperature fluctuations were within ± 1° during the stringing

09272011 1CLAS12R1StringingTemp.png

With 3 stringers rotating, we were able to string 45 Guard wires today.

9/28/11

A strip door was installed between the cleanroom area and the beam lab counting room. Several ducting pipes that are connected to adjacent rooms were also sealed off.

69 Guard wires were strung today.

The graph below was drawn at 6:32 pm on 9/29/11. It seems time stamp 0:00 corresponds to 6pm. It appears that the stringers enter the clean room around 8am (14:00) and warm up the clean room by almost 1 degree. TEMP4 is a thermometer on the vinyl wall right next to the chamber that is currently being strung. Temp1 is the middle of the clean room. Temp2 and Temp3 are on the opposite wall to the drift chamber currently being strung.

09282011 1CLAS12R1StringingTemp.png

9/29/11

Since the previous change of our Δt to ±4° only changed the amplitude of our temperature change and didn't change our frequency, our Δt was changed back to ±2° at 2:30 PM.

092911 1CLAS12R1StringingBegins.jpg092911 2CLAS12R1StringingBegins.jpg

91 guard wires were strung today.

The HVAC temperature set point was increased to 68° F at 4:15 PM.

CLAS12_R1