EXHIBIT 99.5

BROOKS AUTOMATION, INC.
C/O COMPUTERSHARE
P.O. BOX 8694
EDISON, NJ 08818-8694

                Your vote is important. Please vote immediately.

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      Vote-by-Internet                            Vote-by-Telephone

Log on to the Internet and go to    OR      Call toll-free
http://www.eproxyvote.com/brks              [1-877-PRX-VOTE (1-877-779-8683)]
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  If you vote over the Internet or by telephone, please do not mail your card.

            DETACH HERE IF YOU ARE RETURNING YOUR PROXY CARD BY MAIL

      Please mark
[X]   votes as in
      this example.



                                                                                                       
                                                                                         FOR       AGAINST       ABSTAIN

THE BOARD OF DIRECTORS OF BROOKS RECOMMENDS A VOTE "FOR" EACH PROPOSAL.

1. To approve the issuance of shares of Brooks Automation, Inc. ("Brooks")
common stock pursuant to the Agreement and Plan of Merger, dated as of July 11,          [ ]         [ ]           [ ]
2005, as amended on August 29, 2005, among Brooks, Mt. Hood Corporation and
Helix Technology Corporation (the "Merger Agreement"):

2. To approve a proposal to amend Brooks' certificate of incorporation if the
merger governed by the Merger Agreement is consummated to increase Brooks'               [ ]         [ ]           [ ]
authorized shares of common stock from 100,000,000 shares to 125,000,000 shares:

3. To permit Brooks' board of directors or its chairman, in its or his
discretion, to adjourn or postpone the special meeting if necessary for further
solicitation of proxies if there are not sufficient votes at the originally              [ ]         [ ]           [ ]
scheduled time of the special meeting to approve the previous two proposals:

4. To act upon such other matters as may properly come before the meeting or any
adjournments or postponements thereof.


                                                MARK HERE FOR ADDRESS CHANGE AND
                                                NOTE AT LEFT [ ]

(Signatures should be the same as the name printed hereon. Executors,
administrators, trustees, guardians, attorneys, and officers of corporations
should add their titles when signing.)

Signature:___________  Date: ______  Signature: ______________  Date: _________




                      DETACH HERE IF YOU ARE RETURNING YOUR
                               PROXY CARD BY MAIL

                                      PROXY

                             BROOKS AUTOMATION, INC.

The undersigned hereby appoints Edward C. Grady, Robert W. Woodbury, Jr. and
Thomas S. Grilk, and each of them, with full power of substitution, attorneys
and proxies to represent the undersigned at the special meeting of stockholders
of Brooks Automation, Inc. to be held on October 26, 2005, at 9:00 a.m., local
time, and at any adjournment or adjournments thereof, with all power which the
undersigned would possess if personally present, and to vote all shares of stock
which the undersigned may be entitled to vote at said meeting upon the matters
set forth in the Notice of and Joint Proxy Statement/Prospectus for the meeting
in accordance with the following instructions and with discretionary authority
upon such other matters as may come before the meeting. All previous proxies are
hereby revoked.

THIS PROXY IS SOLICITED ON BEHALF OF THE BROOKS BOARD OF DIRECTORS. IT WILL BE
VOTED AS DIRECTED BY THE UNDERSIGNED AND IF NO DIRECTION IS INDICATED, THIS
PROXY WILL BE VOTED FOR EACH OF THE PROPOSALS DESCRIBED ABOVE AND IN THE
DISCRETION OF THE PROXY WITH RESPECT TO ANY OTHER MATTERS THAT COME BEFORE THE
SPECIAL MEETING.

SEE REVERSE                                                      SEE REVERSE
   SIDE           CONTINUED AND TO BE SIGNED ON REVERSE SIDE        SIDE