![](media/image1.png){width="2.4583333333333335in" height="1.375in"}

**\*\*\* First DRAFT \*\*\***

***WBS 1.3 RICH Detector***

***Installation Plan***

***By***

***H. Cease et. al.***

**BTeV Document** (number to be assigned)

**August 16, 2002**

# INTRODUCTION

> The present installation scenario is for the RICH detector tank to be
> assembled in the assembly hall without instrumentation. The tank will
> not be instrumented with mirrors, HPDs, or PMTs. The acrylic windows
> for the PMT and HPD arrays, front entrance window, liquid radiator
> vessel, rear exit window, and beam pipe are part of the tank assembly.
> When all of the tank windows are in place, an initial gas leak check
> is performed. Once the tank is assembled in the assembly hall, it is
> transported using rollers into the collision hall. At a later date,
> suitable to the installation schedule, the HPD and PMT arrays and the
> mirror panels are installed. The RICH tank is installed after the
> Vertex Magnet and Toroid Magnets are installed into the collision
> hall.

**ASSEMBLY STEPS**

> The following steps must be performed before installing the tank into
> the collision hall:

1.  Shipping the tank frame segments to C-Zero;

2.  Assembling the tank frame;

3.  Attaching the liquid radiator vessel to the tank;

4.  Mounting windows to the frame;

5.  Inserting the beam pipe into the tank;

6.  Making the beam pipe to window seals;

7.  Initial gas leak check of the tank frame and window seals.

> **Tank frame segments**
>
> The Rich Tank frame segments are shipped in pieces small enough to fit
> through the C-Zero exterior entrance door. The entrance door is
> approximately 12 feet wide and 13 feet tall. The frame segments are
> large and require a rigging crew and a technician crew to assemble.
> Assembly of the tank frame is estimated to take 1 month calendar time.
>
> **Liquid Radiator Vessel**
>
> The liquid radiator vessel is inserted and mounted to the tank frame.
> Plumbing lines from the radiator vessel to the exterior of the tank
> are connected. Fiducials located on the radiator vessel are
> transferred to the tank frame. Mounting the liquid radiator vessel is
> estimated to take 1 week calendar time.
>
> **Windows**
>
> The RICH tank walls consist of acrylic and carbon fiber windows for
> photon and particle transparency. In order to make the windows
> replaceable, the windows are mounted with flanges and o-ring seals.
> Due to the large number of attaching nuts and length of the o-rings,
> an initial gas leak check on all seals must be performed. Mounting the
> windows and leak checking is estimated to take 2 weeks calendar time.
>
> **Beam Pipe**
>
> Installation of the beam pipe involves replacing the standard Tevatron
> beam pipe with custom beam pipe sections. The RICH beam pipe section
> is supported by the RICH tank frame. Then the window to beam pipe seal
> is made. The continuity of the Tevatron beam pipe must be restored to
> a vacuum below 10^-7^ torr. Inserting the beam pipe into the tank
> frame and making the seals is estimated to take 1 week calendar time.

**RICH TANK INSTALLATION**

The RICH tank installation involves the following steps:

1.  The shielding door is opened at the start of a Tevatron shutdown
    period.

2.  The RICH tank assembly is rolled into the collision hall by riggers
    utilizing rollers at C0 and temporary steel plates on the floor.

3.  The RICH tank assembly will be surveyed and adjusted to its correct
    location with respect to the Tevatron.

> It is estimated that installation requires 1 month and surveying
> requires 1 week of calendar time.

**HPD ARRAY INSTALLATION**

> The HPD array installation is performed after the straw tube
> installation is complete. The HPD array includes the mu-metal beehive,
> HPD enclosure, exterior magnetic shielding, HPD hexads and associated
> electronic cooling and electronic cables. The HPD hexads are
> independent to the assembly structure and can be installed when
> received. Installation of the assembly involves the following steps:

1.  The Straw Tube installation is complete.

2.  The shielding door is opened at the start of a Tevatron shutdown
    period.

3.  The HPD assembly is rolled into the collision hall by riggers
    utilizing rollers at C0 and temporary steel plates on the floor.

4.  The HPD assembly will be surveyed and adjusted to its correct
    location with respect to the Tevatron and the RICH tank.

5.  All necessary electronic cooling, electronic readout, and gas purge
    connections are made.

> It is estimated that installation requires 1/2 week per array and
> surveying requires 1 week of calendar time. An individual HPD hexad
> can be installed by carrying it through the labyrinth door during a
> Tevatron shutdown period. Installation of an individual hexad requires
> the removal the exterior magnetic shielding on the HPD enclosure,
> opening the HPD enclosure, inserting the hexad into the bee-hive
> structure, making the necessary electronic and cooling connections,
> closing the HPD enclosure and replacing the exterior magnetic
> shielding. Installation of the hexad would require 1 day of calendar
> time.

**PMT ARRAY INSTALLATION**

> The PMT array installation is performed at a convenient time in the
> installation schedule and is not affected by the installation of other
> components. The PMT array includes the metal beehive, PMT enclosure,
> exterior magnetic shielding, PMT modules and associated electronic
> cooling and electronic cables. The PMT modules are independent to the
> assembly structure and can be installed when received. Installation of
> the assembly involves the following steps:

1.  The labyrinth door is opened at the start of a Tevatron shutdown
    period.

2.  The PMT assembly is rolled into the collision hall by riggers
    utilizing rollers at C0 and temporary steel plates on the floor.

3.  The PMT assembly will be surveyed and adjusted to its correct
    location with respect to the Tevatron, the RICH tank, and the liquid
    radiator vessel.

4.  All necessary electronic cooling, electronic readout, and gas purge
    connections are made.

> It is estimated that installation requires 1/2 week per array and
> surveying requires 1 week of calendar time.

**MIRROR INSTALLATION**

> The mirror panel consists of the individual mirror tiles, three point
> mounts used to attach the mirror tile to the mirror support panel, and
> mounts used to attach the support panel to the frame. As part of the
> mirror panel assembly, individual mirror tiles are calibrated and
> adjusted to each other prior to the mirror panel installation. The
> mirror panel installation involves the following steps:

1.  The shielding door is opened at the start of a Tevatron shutdown
    period;

2.  The mirror panel and its temporary support frame are rolled into the
    collision hall;

3.  The RICH tank is opened by removing a side panel;

4.  The Beam Pipe is separated to allow the mirror installation;

5.  The mirror panel is transferred from the temporary support frame to
    the RICH tank mirror support rails;

6.  The mirror panel is moved into position in the tank;

7.  Fiducial marks on the mirror panel are transferred from the panel to
    the exterior of the RICH tank;

8.  The Beam Pipe is reassembled;

9.  The mirror panels are surveyed and adjusted to their correct
    location with respect to the Tevatron, the HPD arrays and the RICH
    tank frame.

10. The RICH tank is closed;

> The mirror panels can be adjusted remotely by using motorized mounts.
> If an individual mirror tile needs to be replaced or adjusted, the
> rear window will need to be removed. Each time the beam pipe is
> separated, the continuity of the Tevatron beam pipe must be restored
> with a vacuum below 10^-7^ torr. It is estimated that the installation
> of the mirror panels requires 1 month and surveying requires 1 week of
> calendar time.

**FILLING THE LIQUID RADIATOR VESSEL WITH C5F12 LIQUID**

> Filling the liquid radiator vessel requires that the following tasks
> are complete:

1.  The vessel has been installed into the RICH tank;

2.  The vessel has been leak checked;

3.  The liquid radiator re-circulation system is complete and has been
    tested.

> The process of filling the liquid radiator vessel and confirming the
> re-circulation system is operating properly is estimated at 1 month of
> calendar time.

**FILLING THE RICH TANK WITH C4F10 GAS**

> Filling the RICH radiator tank requires that the following tasks are
> complete:

1.  The tank has been installed in the collision hall;

2.  The tank has been leak checked;

3.  All of the mirrors have been installed and are position with respect
    to each other, the HPD array, and the Tevatron;

4.  The gas radiator re-circulation system is complete and has been
    tested.

> The process of filling the RICH tank and confirming the re-circulation
> system is operating properly is estimated at 1 month of calendar time.