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PrimEx Note 31
Shipping HYCALBy Dave Kashy
1/20/05
On July 30, 2004 the HYCAL Detector was shipped from the test lab to Hall B. A number of precautions were taken to minimize any chance of damaging the crystals. A test was done earlier in the summer to see how the Hall C Truck would handle driving down the truck ramp. It was found that the brakes chattered at a high frequency so we decided to use a second truck to do the braking for the hall C truck. HYCAL was mounted to a shipping base and the base was isolated from the truck bed by 2” of very high density foam rubber, (this foam was originally used for calorimeter shipping). The Hall C truck bed is made of ~20,000 lbs of steel plate and has tilt motion that allowed HYCAL to remain vertical while riding down the truck ramp. There were 3 phases of the motion. The first was lifting the detector to the truck in the test lab, followed by driving across the site and finally lifting the detector off the truck removing the shipping base and putting on the cart on the beam line.
Hall C Truck : Let air in tires down to ~75% of max, two way radio on board. Walter Kellner drive
Braking truck: Loaded with 7500 lbs on tail, 30ft 18 ton strap, Doug Driving, two way radio on board
Dave K, ride truck monitor Accelerometer: holding two way radio
Clear roads – tech
Hycal:
Internal supports locked in
Mounted on Shipping base. Design: 1st mode natural frequency = 4 Hz
Covered with white plastic for rain and sun protection.
Accelerometer mounted and monitored
2 magnetic base levels mounted to frame
Photo 1. Hall C Truck w/o HYCAL mounted.
Result: No accelerations > 0.05 g’s max indicated 0.2 g’s but that was when DK bumped the wires.
HYCAL Lift to Truck 7/30/04
-0.015
-0.01
-0.005
0
0.005
0.01
0.015
0.02
0.025
7:26:24 7:40:48 7:55:12 8:09:36 8:24:00 8:38:24 8:52:48 9:07:12
Time
RMS
Acc
(g's
)
Shipping H YC AL from Test Lab to H all B
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0.25
8:38:24 8:52:48 9:07:12 9:21:36 9:36:00 9:50:24 10:04:48
Tim e
RM
S
Acc
eler
atio
n (
g's
)